According to simple interest, Patricio will have $537.50 in his savings account after 5 years.
To calculate the amount of money Patricio will have in his savings account after 5 years, we can use the formula for simple interest, which is I = prt. "I" stands for the amount of interest earned, "p" stands for the principal amount deposited, "r" stands for the interest rate per year (as a decimal), and "t" stands for the time period in years.
In this case, the principal amount (p) is $500, the interest rate (r) is 1.5% or 0.015 as a decimal, and the time period (t) is 5 years. Using the formula I = prt, we can calculate the amount of interest earned over 5 years:
I = prt
I = $500 x 0.015 x 5
I = $37.50
So, Patricio will earn $37.50 in simple interest over 5 years. To find out the total amount of money he will have in his savings account after 5 years, we simply add the interest earned to the principal amount:
Total amount = Principal amount + Interest earned
Total amount = $500 + $37.50
Total amount = $537.50
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Stated here are some claims or research hypotheses that are to be substantiated by sample data. In each case, identify the nulll hypothesis H0 and the alternative hypothesis H1 in terms of the population mean %u03BC
a) The mean time a health insurance company takes to pay claims is less than 14 working days.
b) the average person watching a movie at a local multiplex theater send over $4.50 on refreshments.
c) The mean hospital bill for birth in the city is less than $5000.
d) The mean time between purchases of a brand of mouthwash by loyal customers is different from 60 days.
The null hypothesis and alternative hypothesis for the population mean µ are identified for the given research hypotheses.
The null hypothesis and alternative hypothesis for the population mean µ are as follows:a) H0: µ ≥ 14; H1: µ < 14b) H0: µ ≤ $4.50; H1: µ > $4.50c) H0: µ ≥ $5000; H1: µ < $5000d) H0: µ = 60; H1: µ ≠ 60 Research hypotheses that are to be substantiated by sample data are as follows:a) The mean time a health insurance company takes to pay claims is less than 14 working days.Null hypothesis H0: µ ≥ 14 Alternative hypothesis H1: µ < 14b) The average person watching a movie at a local multiplex theater send over $4.50 on refreshments.
Null hypothesis H0: µ ≤ $4.50 Alternative hypothesis H1: µ > $4.50c) The mean hospital bill for birth in the city is less than $5000.Null hypothesis H0: µ ≥ $5000 Alternative hypothesis H1: µ < $5000d) The mean time between purchases of a brand of mouthwash by loyal customers is different from 60 days.Null hypothesis H0: µ = 60 Alternative hypothesis H1: µ ≠ 60 Hence, the null hypothesis and alternative hypothesis for the population mean µ are identified for the given research hypotheses.
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Lewis wants to play several games of paintball with his friends. At the park, it costs $19.31 for admission and paintballs, and $6.71 for each game he plays. Which of the following equations could be used to determine Lewis's total cost for several games of paintball?(Let x represent the number of games Lewis plays and y represent his total cost.)
A.
y = $6.71x
B.
$19.31y = $6.71x
C.
y = $19.31x + $6.71
D.
y = $6.71x + $19.31
Find the exact value of sin−1(cos(1013π)).
The exact value of sin−1(cos(1013π)) is sin−1(1 / (2sin(1013π) - cos(1013π) + 1)).
To find the exact value of sin−1(cos(1013π)), we need to use the identity sin^2(x) + cos^2(x) = 1. Since sin−1(cos(1013π)) is an angle whose sine is cos(1013π), we can let that angle be x: sin(x) = cos(1013π).Let's find the sine of x using the identity sin^2(x) + cos^2(x) = 1:sin^2(x) + cos^2(x) = 1sin^2(x) + (cos(1013π))^2 = 1sin^2(x) + cos^2(1013π) = 1sin^2(x) + sin^2(π/2 - 1013π) = 1Now we need to simplify sin^2(π/2 - 1013π):sin^2(π/2 - 1013π) = sin^2(π/2)cos^2(1013π) - 2sin(π/2)cos(1013π)sin(1013π/2) + sin^2(1013π/2)= 1(cos(1013π))^2 - 2sin(1013π/2)cos(1013π) + 0= cos^2(1013π) - 2sin(1013π)cos(1013π)= cos(1013π)(cos(1013π) - 2sin(1013π))Using the identity sin^2(x) + cos^2(x) = 1, we can rewrite sin^2(x) as 1 - cos^2(x):sin^2(x) + cos^2(x) = 11 - cos^2(x) + cos^2(1013π) = 11 - cos(1013π)(cos(1013π) - 2sin(1013π)) + cos^2(1013π) = 1cos(1013π) - cos(1013π)^2 + 2sin(1013π)cos(1013π) = 1cos(1013π) + cos(1013π)(2sin(1013π) - cos(1013π)) = 1cos(1013π)(2sin(1013π) - cos(1013π) + 1) = 1cos(1013π) = 1 / (2sin(1013π) - cos(1013π) + 1)Therefore, the exact value of sin−1(cos(1013π)) is sin−1(1 / (2sin(1013π) - cos(1013π) + 1)).
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Marrero spotted an exclamation point on a billboard in Little Havana. This exclamation point consists of a circle sector and circle. Marrero measured the radius of the sector to be 9 ft, and the radius of the circle to be 1. 5 ft. At the end, he found out that the angle of the sector is 24°. What is the total area of the exclamation point on this Little Havana billboard? Round to the nearest square foot
The overall area of the exclamation point at the Little Havana billboard is about 24 square ft while rounded to the nearest square foot.
To discover the total area of the exclamation point, we need to calculate the area of the sector and the area of the circle, after which add them collectively.
First, let's find the area of the sector. The formula for the area of a circle area is:
Area of sector = (angle/360) x π x radius^2
Substituting the given values, we get:
Area of sector = [tex](24/360) x π x 9^2 = 16.62 ft²[/tex]
Next, let's find the area of the circle. The components for the area of a circle is:
Area of circle = π x radius^2
Substituting the given value, we get:
Area of circle [tex]= π x 1.5^2 = 7.07 ft²[/tex]
Now, we are able to add the areas of the sector and the circle to get the whole area of the exclamation point:
[tex]6.62 feet² + 7.07 feet² = 23.69 ft²[/tex]
Therefore, the overall area of the exclamation point at the Little Havana billboard is about 24 square ft while rounded to the nearest square foot.
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Which question can best be answered by finding the volume of a figure
Finding the volume of a figure is a useful tool for solving practical problems that involve 3D space and quantities, such as capacity, mass, or density.
Finding the volume of a figure is a common mathematical calculation used in various fields, such as architecture, engineering, physics, and chemistry. The volume of a figure is a measure of the amount of space that it occupies in three-dimensional (3D) space, such as a cube, a cylinder, a sphere, or a complex shape.
One example of a question that can be answered by finding the volume of a figure is "How much water can a swimming pool hold?" The swimming pool is a 3D figure that can be approximated as a rectangular prism, with a length, width, and depth. By multiplying these three dimensions, we can find the volume of the swimming pool, which represents the amount of water it can hold. This information is useful for designing and constructing the swimming pool, as well as for filling and maintaining it.
Another example is "How much concrete is needed to build a retaining wall?" The retaining wall is a 3D figure that can be approximated as a trapezoidal prism, with a length, height, and thickness. By multiplying these three dimensions, we can find the volume of the retaining wall, which represents the amount of concrete required. This information is useful for estimating the cost and resources needed for the project.
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Which equation represents this transformation?
a. Is this tunction increasing of decreasing for the yearn2000−2015? A) Incroasing B) Decreasing
The correct answer is option A) Increasing.
The given question is regarding the function and its behavior. To determine whether a given function is increasing or decreasing, we should first find its derivative. Then, if the derivative is positive, the function is increasing, and if the derivative is negative, the function is decreasing.A function is given as: yearn = f (2000, 2015)Here, the independent variable is "year," and the dependent variable is "n." Thus, to find out whether this function is increasing or decreasing, we need to find the derivative of this function:$$\frac{dy}{dx}=\frac{dy}{dn}*\frac{dn}{dx}$$$$\frac{dy}{dx}=0.028$$Since the derivative is positive, it means the function is increasing. Therefore, the correct answer is option A) Increasing.
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Your monthly bill for machine parts is $2,628. 53. If you pay the bill within 15 days, you'll receive a 2% reduction. What will your bill be if you pay it within the allotted time?
The new amount due, subtract the discount of $52.57 from the original bill of $2,628.53, giving the new amount due of $2,579.06. Therefore, if you pay the bill within 15 days, you will receive a 2% reduction and your bill will be $2,579.06.
To calculate the amount due if paying within 15 days, you would need to apply the 2% discount to the original amount. To do this, first find the amount of the discount by multiplying the original bill of $2,628.53 by 0.02. This gives a discount of $52.57. To calculate the new amount due, subtract the discount of $52.57 from the original bill of $2,628.53, giving the new amount due of $2,579.06. Therefore, if you pay the bill within 15 days, you will receive a 2% reduction and your bill will be $2,579.06.
Original Bill : $2,628.53
Discount (2%) : $2,628.53 x 0.02 = $52.57
Amount Due (after 15 days) : $2,628.53 - $52.57 = $2,579.06
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Edmund had $140. He spent 3 7 of his money on toys and 1 5 of his money on new clothes. How much money did Edmund spend altogether?
Edmund spent $63.50 on toys and $28 on new clothes, for a total cost of $91.50.
Edmund had $140 and he decided to spend some of that money on toys and some on new clothes. To calculate how much he spent altogether, we need to first figure out how much he spent on each item. For toys, he spent 3/7 of his total money, which is equal to $63.50. For new clothes, he spent 1/5 of his total money, which is equal to $28. Now that we know how much he spent on each item, we can add these two numbers together to figure out how much he spent altogether. When we add $63.50 and $28, we get a total of $91.50. This means that Edmund spent $91.50 on toys and new clothes altogether.
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for a normal distribution with mean 50 and standard deviation 15
find the Q1 and Q3
Q1 = 7.75th item
Q3 = 23.25th item
Given,For a normal distribution with mean 50 and standard deviation 15,To find Q1 and Q3Formula for Q1 and Q3:Q1 = (n + 1)/4Q3 = 3(n + 1)/4Here, n = total number of observationsn = 2 × 15 = 30Thus, n + 1 = 31We know that for a normal distribution the Z values for Q1 and Q3 are -0.67 and 0.67 respectively.Normal distribution is a statistical model that describes the randomness of a variable in a population. It is symmetric around the mean. The mean is an essential property of a normal distribution. The standard deviation is the amount of variability among the observations that a distribution has.Mean = 50Standard deviation = 15Q1 = (n + 1)/4 = (30 + 1)/4 = 7.75th itemQ3 = 3(n + 1)/4 = 3 × (30 + 1)/4 = 23.25th itemThe 7.75th item and 23.25th item are calculated with the help of the formula.
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1. There are three buses A, B and C. the total
number of seats in the three buses is 250. 28% of
the 250 seat are in bus A.
number of seats in bus B:number of seats in bus
C = 3:2
38 of the seats in bus B are empty. 26 in bus C
are empty.
Jamie says the percentage of the seats in bus B
that are empty is greater than the percentage of
the seats in bus C that are empty. Is Jamie
correct.
Thus, Jamie is wrong. In contrast to Bus C, Bus B has less unoccupied seats as a percentage of total seats.
How do the percentages translate?% is a relative number that is used to represent hundredths of the any quantity. Since one percent (symbolized as 1%) is equal to one hundredth of something, 100 percent stands for everything, and 200 percent refers to twice the amount specified. percentage.
Find the complete seating capacity in Bus A first:
Bus A has 28% of the available seats, making its seat count 0.28 x 250 = 70.
Secondly, we can construct an equation system using the number of seats in Bus B compared to Bus C:
The number of seats aboard Bus B will be x.
In that case, Bus C's seating capacity is (2/3)x.
Using the information that there are 250 seats overall, we can find x:
70 (from Bus A) + x (from Bus B) + (2/3)x (from Bus C) = 250
When we simplify this equation, we obtain: (5/3)x = 180
When we solve for x, we get x = 108.
Bus C has (2/3)x = 72 seats, but Bus B has 108 seats.
We can now determine the proportion of vacant seats for each bus:
Out of a total of 108 seats, 38 seats on Bus B are vacant, making the percentage of vacant seats in Bus B (38/108) x 100% = 35.19%.
Out of a total of 72 seats, there are 26 empty seats on Bus C, making the percentage for empty seats there (26/72) x 100% = 36.11%.
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Answer:
what paper is this for this question
Which deal is better. 500ml of lemonade for 94p or 750ml of lemonade for £1.44
Answer:
To compare the deals, we need to find the price per milliliter of lemonade for each deal.
For the first deal, the price per milliliter is:
94p / 500ml = 0.188p/ml
For the second deal, the price per milliliter is:
£1.44 / 750ml = 0.192p/ml
Therefore, the first deal is better as it has a lower price per milliliter of lemonade.
HELP ASAP PLEASE
When an object is dropped vertically from a platform, its height after seconds can be estimated with the formula shown.
ℎ=ℎ0−162
ℎ is the height of the object in feet.
ℎ0 is the initial height of the object in feet.
is the time in seconds after the drop.
Which equation and solution tells how long it takes the object to reach a height of 84 feet if its initial height is 180 feet?
Answer:
this does not make sense I mean ate you in un 200lev
Answer:
C
Step-by-step explanation:
What is the measure of angle H? Explain what is the measure of angle i ? explain
The measure of angle H is given as 67.5 degrees
The measure for angle I is 112.5 degrees
How to solve for angle HThe question tells us that ∠F must be 67.5°
from the sign, the angles H and the angle F are vertical angles.
Hence the value of ∠F = ∠H
∠H = 67.5°
what is the measure of angle i ?From the transversal, we can see that the angle E and angle I are corresponding angles
to get angle E
= 67.5° + ∠E = 180 (angles on a straight line)
∠E = 180 - 67.5
∠E = 112.5 degrees
Since ∠E and ∠I are corresponding angles, ∠I = 112.5 degrees
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The stop sign is a regular octagon, so the measure of ∠F must be 67.5°. What is the measure of angle H? Explain what is the measure of angle i ? explain
Philip claimed that the expression -p + 5 + p is positive for any value of p. Determine whether Philip's statement is always true, sometimes true, or never true. Provide evidence to support your conclusion
The expression is always positive Philip's statement is always true.
The expression -p + 5 + p can be written as -p + 5 + p = -p + p + 5,
which simplifies to 5, no matter what the value of p is.
An expression is a mathematical phrase that can contain numbers, variables, and operations such as addition, subtraction, multiplication, and division. Expressions may or may not have an equal sign. Expressions can be evaluated by replacing any variables with specific values and then simplifying the resulting expression using the order of operations.
Therefore, the expression is always positive and Philip's statement is correct.
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What does the circled part of the picture represent?
a point
a line
line segment
ray
Answer:
What does the circled part of the picture represent?
A) a point
B) a line
C) line segment
D) ray
Step-by-step explanation:
it is a btw
The options for the drop-down menus are;
1. 0 and -3/ -3, 0, and 3/ 0 and 3/ -3 and 3.
2. no/two/three/four.
3. no/two/three/four.
The graph of the function has zeros of 0 and 3, two distinct real zeros, and no complex zeros.
What is a function?
It is defined as a special type of relationship and they have a predefined domain and range according to the function.
We have a function:
y= x²(x² - 6x + 9)
We can write it as a:
y=x²(x-3)²
To find the zeros equate to the function with the zero.
y = 0
x²(x-3)² =0
First, take x²=0 we get:
x = 0
Now
(x - 3)² =0
x - 3 = 0
x = 3
Thus, the graph of the function has zeros of 0 and 3, two distinct real zeros, and no complex zeros.
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\begin{tabular}{cc} \hline Number of Hours & Frequency \\ \hline 0 & 127 \\ 1 & 176 \\ 2 & 348 \\ 3 & 252 \\ 4 & 328 \\ 5 & 239 \\ 6 & 139 \\ 7 & 27 \\ 8 & 60 \\ \hline Total & 1696 \end{tabular} (b) Compute the standard deviationσX. Round the answer to at least three decimal places.σX=
The standard deviation is σX ≈ 1.936 (rounded to at least three decimal places).
Standard deviation (σX) is a measure that is used to quantify the amount of variation or dispersion of a set of data values. Here is how to compute it from the given data:\begin{tabular}{cc} \hline Number of Hours & Frequency \\ \hline 0 & 127 \\ 1 & 176 \\ 2 & 348 \\ 3 & 252 \\ 4 & 328 \\ 5 & 239 \\ 6 & 139 \\ 7 & 27 \\ 8 & 60 \\ \hline Total & 1696 \end{tabular}(b) Compute the standard deviation σX. Round the answer to at least three decimal places.The formula to use is:\[\sigma_X = \sqrt{\frac{\sum f(x_i - \overline{x})^2}{n}}\]where:σX = standard deviation∑ = sum off = frequencyxi = value of i-th datan = total number of data\[\overline{x} = \frac{\sum fx}{n}\]is the sample mean, which we must calculate first.\[\overline{x} = \frac{\sum fx}{n} = \frac{0\cdot127 + 1\cdot176 + 2\cdot348 + 3\cdot252 + 4\cdot328 + 5\cdot239 + 6\cdot139 + 7\cdot27 + 8\cdot60}{1696} \approx 2.7875\]Substituting into the standard deviation formula:\[\sigma_X = \sqrt{\frac{\sum f(x_i - \overline{x})^2}{n}} = \sqrt{\frac{0\cdot(127 - 2.7875)^2 + 1\cdot(176 - 2.7875)^2 + 2\cdot(348 - 2.7875)^2 + 3\cdot(252 - 2.7875)^2 + 4\cdot(328 - 2.7875)^2 + 5\cdot(239 - 2.7875)^2 + 6\cdot(139 - 2.7875)^2 + 7\cdot(27 - 2.7875)^2 + 8\cdot(60 - 2.7875)^2}{1696}} \approx 1.936\]Therefore, the standard deviation is σX ≈ 1.936 (rounded to at least three decimal places).
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. A normally distributed data set has a µ = 10, the z score for 10 is ___.
10. To convert a z score into a raw score, we need the population mean and the population standard deviation.
True
False
11. Using the Normal Curve table, what is the total percentage between a standard deviation of -2 and +1?
9. A normally distributed data set has a µ = 10, the z score for 10 is 0.
10. It is true that the standard deviation is needed to convert a raw score to a z-score.
11. The total percentage between a standard deviation of -2 and 1 is given as follows: 81.85%.
How to obtain probabilities using the normal distribution?The z-score of a measure X of a variable that has mean symbolized by [tex]\mu[/tex] and standard deviation symbolized by [tex]\sigma[/tex] is obtained by the rule presented as follows:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The z-score represents how many standard deviations the measure X is above or below the mean of the distribution, depending if the obtained z-score is positive or negative.Using the z-score table, the p-value associated with the calculated z-score is found, and it represents the percentile of the measure X in the distribution.The z-score for the mean is given as follows:
Z = 0/s
Z = 0.
The p-values relative to z-scores between -2 and 1 are given as follows:
z = 1: 0.8413.z = -2: 0.0228.Hence the percentage is given as follows:
84.13 - 2.28 = 81.85%.
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A softball coach has ordered softballs for two different leagues. The Junior League uses an 11-inch softball priced at $2.50 each. The Senior League uses a 12-inch softball priced at $3.50 each. The softball coach ordered a total of 120 softballs for $350.
If j is the number of softballs ordered for the Junior League and s is the number of softballs ordered for the Senior League, select the system of linear equations that represents the situation.
1. j + s = 350
2.5j + 3.5s = 120
2. j + s = 120
3.5j + 2.5s =350
3. j + s = 350
3.5j + 2.5s = 120
4. j + s = 120
2.5j + 3.5s = 350
The system of linear equations that represents the situation is:
(option 4) j + s = 120
2.5j + 3.5s = 350
How to know the system of linear equations that represents the situation?Let j be the number of 11-inch softballs ordered for the Junior League, and s be the number of 12-inch softballs ordered for the Senior League.
The total number of softballs ordered is 120, so we have:
j + s = 120
The cost of each 11-inch softball is $2.50, and the cost of each 12-inch softball is $3.50. The total cost of the order is $350, so we have:
2.5j + 3.5s = 350
Therefore, the system of linear equations that represents the situation is:
j + s = 120
2.5j + 3.5s = 350
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When the outlier(s) are removed, how does the mean change?
A) The mean decreases by 1.9.
B) The mean increases by 2.4.
C) The mean increases by 1.9.
D) There are no outliers.
Answer:
B) The mean increases by 2.4 because the mean is 1149 and there 6 outliers.
Help!! I need to find the perimeter
The perimeter of the triangle is 72 √5 / 3 units.
How to find the perimeter of a triangle?The perimeter of a triangle is the sum of the whole three sides of the triangle. The triangle above is an equilateral triangle.
An equilateral triangle has all it sides and angles congruent to each other.
Therefore, the perimeter of the triangle can be found as follows:
Let's find the side of the triangle using trigonometric ratios,
sin 60 = opposite / hypotenuse
sin 60 = 4√15 / h
cross multiply
h = 4√15 ÷ √3 / 2
h = 4√15 × 2 / √3
h = 8√15 / √3
Hence,
hypotenuse side = 8√45 / 3
perimeter of the triangle = 8√45 / 3 + 8√45 / 3 + 8√45 / 3
perimeter of the triangle = 8√45 + 8√45 + 8√45 / 3
perimeter of the triangle = 24√45 / 3
perimeter of the triangle = 72 √5 / 3 units
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Use synthetic division and the Remainder Theorem to evaluate P(c). P(x)=3x^(2)+10x+1,c=-1 P(-1)
By answering the abοve questiοn, we may state that Hence, using divide synthetic divisiοn and the Remainder Theοrem, we have established that P(-1) = -1.
What is divide?Divisiοn, οne οf the fοur basic mathematical οperatiοns, is the prοcess οf cοmbining twο numbers tο create a new number. Other οperatiοns include additiοn, subtractiοn, and multiplicatiοn. Divisiοn is the reverse οf multiplicatiοn.
When yοu divide twelve intο its three equal parts, yοu get fοur in each grοup when yοu multiply three grοups οf fοur by twelve. Finding οut hοw many equal grοups are generated when sharing fairly—οr hοw many peοple are in each grοup—is the fundamental purpοse οf sharing. Tο divide is tο separate intο twο οr mοre grοups, classes, sectiοns, οr regiοns οf equal size.
In οrder tο evaluate P(c) using synthetic divisiοn and the Remainder Theοrem, we take the fοllοwing actiοns:
[tex]-1 | 3 10 1\s|_______[/tex]
[tex]-1 | 3 10 1\s| \s3[/tex]
[tex]-1 | 3 10 1\s| \s3\s-13[/tex]
Write the sum οf the twο numbers yοu just nοted dοwn underneath the fοllοwing cοefficient, 1:
[tex]-1 | 3 10 1\s| \s3\s-13\s-1[/tex]
The divisiοn's final value is the leftοver amοunt. The Remainder Theοrem states that this number is equal tο P(-1), which is what we were lοοking fοr. Hence, P(-1) equals 1.
Hence, using synthetic divisiοn and the Remainder Theοrem, we have established that P(-1) = -1.
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We can use the Remainder Theοrem tο cοnclude that the value[tex]P(-1) = 3(-1)^2 + 10(-1) + 1 = 3 - 10 + 1 = -6.[/tex]
What is synthetic divisiοn?Synthetic divisiοn is a shοrthand methοd οf dividing a pοlynοmial by a linear factοr οf the fοrm (x - c), where c is a cοnstant. It is a methοd οf pοlynοmial lοng divisiοn that simplifies the prοcess and reduces the number οf steps required.
Tο evaluate P(-1) using synthetic divisiοn and the Remainder Theοrem, we can fοllοw these steps:
Step 1: Write the cοefficients οf the pοlynοmial P(x) in οrder οf decreasing degree, including any missing terms with a cοefficient οf 0. In this case,
[tex]P(x) = 3x^2 + 10x + 1[/tex]
Step 2: Set up the synthetic divisiοn table by placing the value οf c, which is -1 in this case, in the leftmοst cοlumn and writing the cοefficients οf the pοlynοmial in the secοnd cοlumn:
-1 | 3 10 1
Step 3: Bring dοwn the first cοefficient, which is 3, intο the third cοlumn:
-1 | 3 10 1
---------
3
Step 4: Multiply the value in the third cοlumn by the value οf c, which is -1, and write the result in the fοurth cοlumn:
-1 | 3 10 1
---------
3 -3
Step 5: Add the values in the secοnd and fοurth cοlumns and write the result in the fifth cοlumn:
-1 | 3 10 1
---------
3 -3 0
Step 6: The value in the last cοlumn, 0, is the remainder when P(x) is divided by x + c, which is x + 1 in this case. Therefοre, we can use the Remainder Theοrem tο cοnclude that P(-1) = 0.
Thus, [tex]P(-1) = 3(-1)^2 + 10(-1) + 1 = 3 - 10 + 1 = -6.[/tex]
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HELP!!! Will mark branliest
By De Moivre's formula, the square roots of the complex number √(i 2) are √z = 1 + i and √z = - 1 - i, respectively.
How to find the square roots of a complex numbers
In this problem we find a complex number, whose square roots can be determined by De Moivre's formula:
For z = a + i b:
√z = √r · [cos [(θ + 2π · k) / 2] + i sin [(θ + 2π · k) / 2]], for k = {0, 1}
Where:
r - Normθ - Direction, in radians.If we know that r = 2 and θ = π / 2, then the root of the complex number is:
k = 0
√z = √2 · [cos (π / 4) + i sin (π / 4)]
√z = 1 + i
k = 1
√z = √2 · [cos (5π / 4) + i sin (5π / 4)]
√z = - 1 - i
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how much pure alcohol must a pharmacist add to 10cm^3 of an 8% alcohol solution to strengthen it to an 80% solution
[tex]36 cm^3[/tex] of pure alcoh ol must be added to the [tex]10 cm^3[/tex] of the 8% solution to obtain [tex]10 + 36 = 46 cm^3[/tex] of an 80% solution.
What is Algebraic expression ?
Algebraic expression can be defined as combination οf variables and constants
Let's first calculate the amount of pure alcohol in the 8% solution:
Amount of pure alcohol = 8% of [tex]10 cm^3 = 0.08 x 10 cm^3 = 0.8 cm^3[/tex]
N ow, let's assume [tex]x cm^3[/tex]of pure alcohol must be added to the 10 cm^3 of the 8% solution to obtain a total volume of [tex]10 + x cm^3[/tex] of an 80% solution. The amount of pure alcohol in the final solution would be:
ο[tex](10 + x) cm^3 = 0.8 (10 + x) cm^3[/tex]
Since we started with [tex]0.8 cm^3[/tex]of pure alcohol and we want to end up with
[tex]0.8 (10 + x) cm^3[/tex], we can set up the following equation:
[tex]0.8 + x = 0.8 (10 + x)[/tex]ο
Simplifying and solving for x, we get:
[tex]0.8 + x = 8 + 0.8x[/tex]
[tex]0.2x = 7.2[/tex]
[tex]x = 36[/tex]
Therefore, [tex]36 cm^3[/tex] of pure alcohol must be added to the [tex]10 cm^3[/tex]of the 8% solution to obtain [tex]10 + 36 = 46 cm^3[/tex] of an 80% solution.
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Answer:
36cm^3
Step-by-step explanation:
0. 07, -7. 88, -7. 9, 7. 03, -7. 881 is ascending order
Answer:
-7.9, -7.881, -7.88, 0.07, 7.03
Step-by-step explanation:
Numbers provided: 0.07, -7.88, -7.9, 7.03, -7.881
The numbers that are negative are lower on the number line than negative numbers.You look at the digits from left to rightThe bigger the negative number is, the further left it goesPLEASE SHOW WORK!!!!!!!!!
Answer:
The answer is D
Buffalo Wild Wings charges you $22 per guest plus a room rental fee of $450.
Champs Bar and Grill charges you $210 for a room and $30 per guest.
How many guests can you invite so that the cost of the two restaurants will be equal?
You could invite
That equal cost is equal to
guests at an equal cost.
dollars.
Answer: 30
Step-by-step explanation: TRUSy
use half angle or power reduction formulas to fill in the blanks for the following identity:
Using power reduction formula and half angle formula, the blanks are "-1/2cos(x)" and "2x", respectively.
What are the missing values in the identity?We can use the power reduction formula for sine to express sin(3x) in terms of cosines:
sin(3x) = 3sin(x) - 4sin³(x)
= 3(1 - cos²(x)) - 4(1 - cos²(x))sin²(x)
= 3cos²(x) - 4cos⁴(x) - 4sin²(x)cos²(x)
= 3cos²(x) - 4cos⁴(x) - 2sin²(2x)
Now we can substitute this expression into the left-hand side of the identity and simplify using the half angle formula for cosine:
(sin(3x))⁴ = (3cos²(x) - 4cos⁴(x) - 2sin²(2x))⁴
= (3cos²(x) - 4cos⁴(x) - (1 - cos(4x)))⁴
= (3cos²(x) - 4cos⁴(x) - 1 + cos(4x))⁴
= (cos(4x) - 4cos⁴(x) + 3cos²(x) - 1)⁴
Now we can use the half angle formula for cosine again to express cos(4x) in terms of cosines of multiples of x:
cos(4x) = 2cos²(2x) - 1
= 2(2cos²(x) - 1)² - 1
= 8cos⁴(x) - 8cos²(x) + 1
Substituting this expression back into the above identity, we get:
(sin(3x))⁴ = (8cos⁴(x) - 8cos²(x) + 3cos²(x) - 4cos⁴(x) - 1)⁴
= (4cos⁴(x) - 5cos²(x) - 1)⁴
= (-1/2cos(x) + 1/8cos(2x))⁴
Therefore, the blanks in the original identity can be filled with "-1/2cos(x)" and "2x", respectively.
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The length and width of a rectangle are consecutive integers. The area of the
rectangle is 56 square centimeters. Find the length and width of the rectangle.
The length and width of the rectangle are 7 cm and 8 cm
How to find the length and width of the rectangle.From the question, we have the following parameters that can be used in our computation:
The length and width of a rectangle are consecutive integers
This means that
Length = x
Width = x + 1
So, we have
Area = x * (x + 1)
Substitute the known values in the above equation, so, we have the following representation
x * (x + 1) = 56
Express 56 as 7 * 8
So, we have
x * (x + 1) = 7 * 8
This means that
x = 7
So, we have
Length = 7
Width = 7 + 1
Length = 7
Width = 8
Hence, the length is 7 cm
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