Answers
The value of the the function h(x) at x = 4 is given as follows:
8.7.
The quadratic regression equations for each table are given as follows:
y = -0.127x² + 4.699x - 27.777.y = 32.86x² - 379.14x + 1229.14.How to obtain the value at x = 4?The function for the first item is defined as follows:
h(x) = 50/(5.5 + 8e^(-0.9x)).
At x = 4, the value assumed by the function is obtained replacing the lone instance of x by 4, hence:
h(4) = 50/(5.5 + 8e^(-0.9(4))).
Then a calculator is used to obtain the exact value due to the exponential, hence:
h(4) = 8.7.
How to obtain the regression equations?The regression equations are obtained inserting the points of each table into a quadratic regression calculator.
For the first table, the points are given as follows:
(16, 15), (18, 15.6), (20, 15.7), (21, 15), (23, 13.1), (26, 8.9), (27, 6.6).
Hence the equation is of:
y = -0.127x² + 4.699x - 27.777.
For the second table, the points are given as follows:
(3, 330), (4, 276), (5, 263), (6, 86), (7, 174), (8, 198), (9, 553).
Hence the equation is of:
y = 32.86x² - 379.14x + 1229.14.
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Related Questions
Chris earns $7.00 per hour working on the weekends
He needs at least 210.00 for a new cell phone
Just look at the picture and help please
Answers
The radius of a circle is 10 feet. What is the area of a sector bounded by a 180° arc?
Answers
Answer:
50π feet^2
Step-by-step explanation:
area of the circle = 10^2 π = 100π feet^2
A of the sector = 100π/2 = 50π feet^2
a cowboy agreed to work for one year for $\$19{,}200$ plus a horse. he quit after 7 months and was paid $\$10{,}450$ plus a horse. how many dollars was the horse worth, if the paid salary reflects the fair proportion of his yearly salary?
Answers
The horse was worth it for $1800.
What is proportion?
A mathematical comparison of two numbers is called a proportion. Ratios and fractions are the main bases on which proportion is explained. Two ratios are equal when they are expressed as a fraction in the form of a/b, ratio a:b, and then a proportion. In this case, a and b can be any two integers.
Based on the given question condition, where, 'h' denotes the amount for the horse in dollars, the proportion can be defined as:
or, [tex]\frac{19200 + h}{12} = \frac{10450+h}{7}[/tex]
or, (19200 + h)7 = (10450 + h)12
or, 134400 + 7h = 125400 + 12h
or, 12h - 7h = 134400 - 125400
or, 5h = 9000
or, h = 9000/5 = 1800
Hence, the horse was worth $1800.
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american express executives hypothesize that 40% of college students own an american express credit card. testing this hypothesis is an example of
Answers
Testing the hypothesis "Americans express executives hypothesize that 40% of college students own an Americans express credit card." is an example of generalizing.
What is hypothesis?A hypothesis is a theory put up to explain a phenomenon. A hypothesis must be testable according to the scientific method for it to be considered a scientific hypothesis. Scientific hypotheses are typically based on prior observations that cannot be adequately explained by the current body of knowledge. A straightforward hypothesis only hypothesizes the relationship between two independent and dependent variables.
An example of testing a generalization is "American Express executives' hypothesis that 40% of college students own an American Express credit card."
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Problem 9. Find the perimeter of quadrilateral PORS with the vertices P(-2-2), Q(-1,3), R(5,3), and S(4,-2)
Answers
Answer:
Perimeter is 12+2√26
Step-by-step explanation:
Question:
The perimeter of quadrilateral PQRS with the vertices
P(-2, -2), Q(-1, 3), R(5, 3), and S(4, -2)
Find distances PS and QR:
Notice the y-coordinates are the same for 2 pairs of points
P(-2, -2), S(4, -2) and Q(-1, 3), R(5, 3)
So the distance PS = |-2|+4= 6 and QR = |-1|+5 = 6
Find the distances PQ and SR:
Use the distance formula:
[tex]d= \sqrt{(x_{2}-x_{1} ) ^{2} + (y_{2}-y_{1} ) ^{2} }[/tex]
P([tex]x_{1}[/tex] = -2, [tex]y_{1}[/tex] = -2), Q( [tex]x_{2}[/tex] = -1, [tex]y_{2}[/tex] = 3)
PQ = [tex]\sqrt{(-1--2)^{2} +(3- -2)^{2} } = \sqrt{1^{2} +5^{2} } = \sqrt{26}[/tex]
SR = [tex]\sqrt{26}[/tex], because of PQ and SR are equal.
Find the perimeter of quadrilateral PQRS:
The perimeter is equal to the sum of all sides of the quadrilateral.
P= PS + QR + PQ + SR = 6+6+ √26 +√26 = 12+2√26
4 a. Graph the following system of equations.
y = -3x
y = x + 4
b. what does the graph show to be the solution of the system?
5 DeAndre and Leah are making origami cranes. their goal is to complete 1,000 cranes by the end of the summer.
- DeAndre already has 30 cranes and makes 5 more each day.
- Leah already has 10 cranes and makes 15 more each day.
The graph shows how many cranes, c, each person has made after d days.
a. what does the graph show to be the solution of the system?
b. what does the solution mean in this context?
Answers
4. a. The graph of the system is attached below.
b. The solution is: (-1, 3).
5. a. (2, 40) is the solution as shown by the graph.
b. (2, 40) means that both will complete 40 cranes after 2 days
How to Graph a System of Equation?On a graph, when two lines are plotted for different equations, the solution is the coordinates of the point where both lines intersect.
4. a. The graph of y = -3x is the red line in the image attached below, while that of y = x + 4 is the blue line. They both intersect each other at (-1. 3).
b. The solution of the system is therefore, (-1, 3).
5. a. Using the graph given that shows the lines of the equations of DeAndre and Leah, both lines intersect at (2, 40).
We can therefore state that the solution to the system as shown in the graph is: (2, 40).
b. In the context of the scenario given, the solution (2, 40) means that both will have completed equal amounts of 40 cranes after 2 days.
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s It is required to set a stake to mark a grade of 45.49 ft. The Hl of the level is 53.56 ft and the rod on stake reads 4.32 ft. Determine the amount of cut (C) or fill(F) to be marked on the stake. cut 8.07 ft O fill 8.07 ft cut 3.75 Ft fill 3.75 Ft
Answers
The correct option is option C i.e. the amount of cut (C) to be marked on the stake is equivalent to 3.75 Ft.
Given that:
It is required to set a stake to mark a grade of 45.49 ft.
i.e. required grade = 45.49 ft
The Hl of the level is 53.56 ft
i.e. HI = 53.56 ft
the rod on the stake reads 4.32 ft.
i.e. Stake reading = 4.32 ft
We know that,
The formula for cut/fill is:
Cut/Fill = HI – Stake reading – required grade
Cut/Fill = 53.56 ft - 4.32 ft - 45.49 ft
Cut/Fill = 53.56 ft - 49.81 ft
Cut/Fill = 3.75 ft
As the value is positive therefore this amount is for cut and not the amount of fill.
The amount of cut (C) to be marked on the stake is 3.75 Ft.
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Adrian took out a students' loan that charges 10% annual simple interest. If Adrian paid back a total of $1200 in interest alone during the first four years , how much was Adrian's original loan, in dollars?
$1,000
$3,000
$4,000
$ 6,000
$12,000
Answers
The required simple interest of 10% of four year on principle amount is $857.
What is simple interest?Simple interest depends on the chief measure of a credit or the first store in quite a while account. Straightforward interest doesn't build, and that implies a loan boss will just compensation interest on the chief sum and a borrower couldn't have ever to pay more interest on the recently gathered interest.
According to question:We have,
Amount of four year = $1200
simple interest = 10%
Let loaned amount is x
Then,
interest of four year =×4 x×10/100 = 4x/10
According,
x + 4x/10 = $1200
14x/10 = $1200
x = $12000/14
X = $857 (appox)
Thus, the required loaned amount is $857.
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HELPPP PLEASE ASAP!!!!!!!!
Answers
Answer:
x=6
Step-by-step explanation:
i assume these are similar triangles so we can set them up as fractions
x/9=4/x
cross multiply
9(4)=x(x)
36=x^2
√. √
6=x
and now we can check if each have the same ratio
6/9= 4/6
2/3=2/3
hopes this helps please mark brainliest
Which one blue, light blue , yellow or red
Answers
answer:
f(g(x))=4x^2-2
step-by-step explanation:
plug g(x) into f(x) to get f(g(x))=2(x^2-1). when this is simplified, you get the answer presented above. the correct answer would be the green option. hope that helps!
g what is the probability of flipping at least 3 heads in 4 flips of 2 fair coin given that the first flip is heads?
Answers
The probability is 0.25.
What is probability?
Probability is the ability to happen. The subject of this area of mathematics is the occurrence of random events. From 0 to 1 is used to express the value. To determine how likely an event is to occur, mathematics has created the concept of probability.
Given there are 2 coins flipped 4 times, we get the following sample space
S = {HHHH, HHHT, HHTH, HHTT, HTHH, HTHT, HTTH, HTTT, THHH, THHT, THTH, THTT, TTHH, TTHT, TTTH, TTTT}
Now, A = event of having at least 3 heads.
A= {HHHH, HHHT, HHTH, HTHH, THHH}
The number of events having the first flip heads is 4.
Therefore, the probability is:
P(A) =
[tex]=\frac{successful \space\ events}{total\space\ sample\space\ events}\\=\frac{4}{16}\\=0.25[/tex]
Therefore, the probability of flipping at least 3 heads in 4 flips of 2 fair coins given that the first flip is heads is 0.25.
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Which figure is
misleading?
1) Figure A
2) Figure B
Answers
Answer:
Figure B.
Step-by-step explanation:
Figure A uses what is visually similar in size cylinders to give a detailed image of the amount of money (assumingly as profit). Each given cylinder that is in similar size represents $200, and so it is easy to figure out how the amount of money per store.
In the case of Figure A,
Save Store = $400
Leff's Store = $800
Low Pricer = $1200
In the case of Figure B, however, while it gives a legend for price per cylinder of that proportion, it does not make use of the legend, and does not give a adequate legend to decipher the Figure. In essence, the data given in Figure B is useless as it makes no use of its legend.
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a lottery offers one $1000 prize, one $500 prize, and eight $100 prizes. one thousand tickets are sold at $4.00 each. find the expectation if a person buys five tickets.
Answers
Answer:
he would have a 50% chance of getting one of the 10 prizes
Evaluate:
please help fast
Answers
Answer: 256
Step-by-step explanation:
8^8/3 is the same as an 8 square root! We have to factor out and I get 2^8 after finish factor the smallest number and get 256!
A product sells at a regular price of $150 which is on sale for 60% off the regular price. Find the sale price.
Answers
The new sale price of the product after the deduction of discount is $60
What is the sale price?In order to solve the given task, use the concept of percentage.
Regular price of the product = $150Percentage discount = 60%New price of the product = Regular price of the product - (Percentage discount × Regular price of the product)
= 150 - (60% × 150)
= 150 - (0.6 × 150)
= 150 - 90
= $60
Consequently, the new selling price of the product is $60
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Find the digits in the ones,tens,and thousandth place
603.2798
Answers
Answer:
3 is in the ones place
0 is in the tens place
9 is in the thousandths place
Step-by-step explanation:
thousands, hundreds, tens, ones (DECIMAL) tenths, hundredths, thousandths
which expression is equivalent to (1 tanθ)tan(2θ) for all values of θ for which (1 tanθ)tan(2θ) is defined?
Answers
The given expression of trigonometry is equivalent to cos(2θ).
What is trigonometric function ?trigonometry capability, in math, one of six capabilities (sine [sin], cosine [cos], digression [tan], cotangent [cot], secant [sec], and co-secant [csc]) that address proportions of sides of right triangles. These six geometrical capabilities comparable to a right triangle.
According to question:We have,
1 - tan^2(θ)/1 + tan^2(θ)
Use 1 + tan^2(θ) = sec^2(θ)
1 - tan^2(θ)/ sec^2(θ)
1/ sec^2(θ) - tan^2(θ)/sec^2(θ)
Use tan(θ) = sin(θ)/cos(θ)
cos^2(θ) - sin^2(θ)×cos^2(θ)/cos^2(θ)
cos^2(θ) - sin^2(θ)
Using sin^(θ) + cos^2(θ) = 1
cos^2(θ) - (1 - cos^2(θ))
2cos^2(θ) - 1
Here we have 2cos^2(θ) - 1 = cos(2θ)
Then, simplification of given expression is cos(2θ).
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Correct question:
which expression is equivalent to 1 - tan^2(θ)/1 + tan^2(θ) for all values of θ for which 1 - tan^2(θ)/1 + tan^2(θ) is defined?
47. refer to exercise 46. suppose the distribution is normal (the cited article makes that assumption and even includes the corresponding normal density curve). a. how likely is it that the sample mean diameter exceeds 71 when n
Answers
The probability that the sample mean diameter surpasses 71 when n = 30 is 0.5 if the distribution is normal (the quoted article makes this assumption and even gives the related normal density curve).
The likelihood that the sample mean diameter exceeds 71 when n = 30 is 0.5, since the normal distribution is symmetric around the mean. This means that there is a 50% probability of the sample mean diameter being above the mean, and a 50% probability that it is below the mean.
The correct question is : suppose the distribution is normal (the cited article makes that assumption and even includes the corresponding normal density curve). a. how likely is it that the sample mean diameter exceeds 71 when n = 30
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in one of the properties of logarithms, the division becomes subtraction. explain what it means. provide an example where this property may be applied. include reference(s) in your post.
Answers
Explained the quotient property "one of the properties of logarithms, the division becomes subtraction" has been explained with an example
In one of the properties of logarithms, the division becomes subtraction. That is the quotient property of the logarithm
Consider the two positive numbers x and y and a ≠ 0
Then,
[tex]log_a[/tex] (m /n) = [tex]log_a[/tex] m - [tex]log_a[/tex] n
Here division became the subtraction
For example
To find the value of [tex]log_2[/tex] (15/ 7) we will use the quotient property of logarithm, here the division of the numbers will be subtraction
[tex]log_2[/tex] (15 / 7) = [tex]log_2[/tex] 15 - [tex]log_2[/tex] 7
Therefore, the quotient property of the logarithm has been explained with example
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in the xy-plane, the line x y k , where k is a constant, is tangent to the graph of 2 y x x 3 1. what is the value of k?
Answers
The value of k is -3.
What is a tangent line?
The straight line that "just touches" the curve at a given location is referred to as the tangent line to a plane curve in geometry. It was described by Leibniz as the path connecting two points on a curve that are endlessly close to one another.
Here, we have
Given
x + y = k
y = x² + 3x
slope of tangent line = dy/dx = 2x+3
k is y-intercept of the tangent line
2x+3 = -1
x = -2
y = (-2)^2+3(-2)+1 = -1
The tangent line passes through the point (-2,-1)
k = x+y
k = -2 -1
k = -3
Hence, the value of k is -3.
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the surface area of a rectangular box is given by the polynomial 2hl 2lw 2hw and is measured in square units. a rectangular box is to be constructed for shipping materials. the box is to have dimensions of 5 inches by 3 inches by 7 inches. find the surface area of the box.
Answers
Surface area of the box measuring 5 inches by 3 inches by 7 inches is 142 square inches.
What is surface area ?The surface area of the object that refers to the overall space that is filled by its surfaces. Different 3D shapes in the geometry have various surface areas, which can be quickly estimated using the formulas. Two categories are used to classify the surface area:
Curved surface area or Lateral surface area
Surface area in total
Surface area of rectangle = 2 ( lb + bh + hl )
Dimensions of box = 5 inches by 3 inches by 7 inches
Hence,
Length = 5 inches
Breadth = 3 inches
Height = 7 inches
By putting it in formula of surface area of rectangle
= 2 ( lb + bh + hl )
= 2 ( 5*3 + 3*7 + 7*5 )
= 2 ( 15 + 21 + 35 )
= 2 * 71
= 142 square inches
Hence, the total surface area of the box is 142 square inches.
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Jose spent 7 days at soccer camp. Each day he spent 4.5 hours training in the midfield. Each hour of training, he ran 1.5 miles. How many miles did he run while at soccer camp?
Answers
Sarah can make 4 cards in 60 minutes. At this rate, how many cards will she make in
300 minutes?
Answers
Answer: 20 cards.
Step-by-step explanation: If Sarah can make 4 cards in 60 minutes, then she can make 1 card in 60/4 = 15 minutes.
Therefore, in 300 minutes, she can make 300/15 = <<300/15=20>>20 cards.
(71+9+3)-(9-11+2) I really need help
Answers
Answer: The correct answer is 83
Step-by-step explanation:
Complete the equations within each set of brackets
(71+9+3)-(9-11+2)
71+9+3 = 83
9-11+2 = 0
Subtract the results
83 - 0 = 83
one number added to three times another number is 24 five times the number added to three times the other number is 36 find the numbers
Answers
The required numbers for the given case are 3 and 7 respectively.
How to solve a linear equation?A linear equation can be solved by equating the LHS and RHS of the equation following some basic rules such as by adding or subtracting the same numbers on both sides and similarly, doing division and multiplication with the same numbers.
As per the given data the problem can be solved as follows,
Suppose the first number be x and the second be y.
Now, the equations can be formed as,
x + 3y = 24 (1)
5x + 3y = 36 (2)
Solve these equations by multiplying equation (1) by 5 and then subtract from (2) as below,
5x + 3y - 5(x + 3y) = 36 - 5 × 24
3y - 15y = -84
=> -12y = -84
=> y = 7
Substitute y = 7 in equation (1) to get,
x + 3 × 7 = 24
=> x = 3
Hence, the numbers for the given problem are 3 and 7 respectively.
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Aaden took a taxi from his house to the airport. The taxi company charged a pick-up fee of $3. 10 plus $2. 75 per mile. The total fare was $27. 85, not including the tip. Write and solve an equation which can be used to determine xx, the number of miles in the taxi ride.
Answers
The equation that will be used to solve the given question is [2.75x+3.10=27.85] and with the help of this equation we know that Aaden took a ride of 9 miles.
What is an equation?The definition of an equation in algebra is a mathematical statement that demonstrates the equality of two mathematical expressions.
For instance, the equation 3x + 5 = 14 consists of the two equations 3x + 5 and 14, which are separated by the 'equal' sign.
So, we know that:
The pick-up fee that the company charges is: #3.10
Ride charges per mile: $2.75
Total fare price: $27.85
So, let x be the number of miles ridden, the equation that will be used to solve the given question will be:
2.75x + 3.10 = 27.85
Now, solve as follows:
2.75x + 3.10 = 27.85
2.75x = 27.85 - 3.10
2.75x = 24.75
x = 24.75/2.75
x = 9
Therefore, the equation that will be used to solve the given question is [2.75x+3.10=27.85] and with the help of this equation we know that Aaden took a ride of 9 miles.
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Write the ratio as a fraction in simplest form, with whole numbers in the numerator and denominator.
42:48
Answers
Answer:
7/8
Step-by-step explanation:42/48 divide both by 6 since that's the greatest common number that divides both
the actual answer pleaseee hellpp asapp
Answers
Answer:
∠BEC is supplementary to ∠AEB
∠AED and ∠BEC are a pair of vertical angles
Plot the points (0, 6) and (3, 0). What is the slope?
6/-3
O 1/2
-1/2
6/3
Answers
Slope is "change in y over change in x".
[tex]m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]
Using those two points, you'd have
[tex]m=\dfrac{y_2-y_1}{x_2-x_1} = \dfrac{0-6}{3-0}=\dfrac{-6}{3}=-2[/tex]
Notice that doesn't match any of the listed answers. The reason is that two of those answers aren't reduced.
If you reduce the first answer of [tex]\dfrac{6}{-3}[/tex], you have [tex]\dfrac{6}{-3}=-2[/tex]. So that first answer is equivalent to the calculation above.
The answer from your list is the first one.
One year, the population of a city was 117,000. Several years later it was 136,890. Find the percent increase.
Answers
The percentage of increase in the population is 17 %
What is an Equation?
Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.
It demonstrates the equality of the relationship between the expressions printed on the left and right sides.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.
Given data ,
Let the percentage increase in the population be = A
Now , the equation will be
The initial population of the city = 117,000
The increase in population of the city = 136,890
Now , the percentage increase in population is given by the formula
initial population of the city + ( A / 100 ) x initial population of the city = increase in population of the city
So , on substituting the values in the equation , we get
Percentage increase in population = 117000 + ( A/100 ) x 117000 = 136890
117000 + ( A/100 ) x 117000 = 136890
Subtracting 117000 on both sides of the equation , we get
( A/100 ) x 117000 = 19890
Divide by 117000 on both sides of the equation , we get
A / 100 = 0.17
Multiply by 100 on both sides of the equation , we get
A = 17 %
Therefore , the value of A is 17 %
Hence , The percentage of increase in the population is 17 %
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