The equation has an imaginary root when (b) c = d
How to determine when the equation has an imaginary rootFrom the question, we have the following parameters that can be used in our computation:
2(c^2+d^2)x^2+(c-d)x+9=0
At the point of imaginary root, we have
b^2 < 4ac
This means that
(c - d)^2 < 4 * 2(c^2+d^2) * 9
So, we have
c^2 + d^2 - 2cd < 72c^2 + 72d^2
Evaluate the like terms
71c^2 + 71d^2 + 2cd > 0
Using a graphing calculator, we have
c = d
Hence, the solution is (b) c = d
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In a grade 7 class,There are 30 students in a class 18 of them own at least one pet.What percent of them have pets.Answer is 60 percent but how do i do the work.NEED URGENT RESPONSE
Answer: Use cross product property
Step-by-step explanation:
I solved it out for you below! I hope it helps! If you need a better explanation maybe ask your teacher? :)
Determine the approximate ordered pair for f(x) =g(x).
=
○ (26,4)
O (18,4)
O (4.26)
○ (4,18)
-50
40
-30
-20
8
10
10
f(x)
g(x)
20
농
50
The approximate solution of the system of equations is given as follows:
(4, 26).
How to obtain the solution to the system of equations?We want to obtain the graphic solution for the system of equations, hence we obtain the point of intersection of the two equations.
For the point of intersection in this problem, we obtain the coordinates as follows:
x-coordinate of approximately 4, as it is less than the half way between 0 and 10.y-coordinate of 26, as it is a value between 20 and 30.This means that the correct option is given by the third option.
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Bobs gift shop sold a record number of cards for Mother’s Day. One salesman sold 36 cards, which was 4% of the cards sold for Mother’s Day. How many cards were sold for Mother’s Day
The number of cards were sold for mother's day is 900 cards.
How to calculate total number using percentage?To calculate a total number using a percentage, first identify the percentage and the total number. Then divide the percentage by 100 to convert it to a decimal fraction. Finally, multiply the total number by the decimal fraction to calculate the total number.
For example, if the percentage is 10% and the total number is 200, first divide 10% by 100 to get 0.1. Then multiply 0.1 by 200 to get 20. The total number is 20.
In another example, if the percentage is 25% and the total number is 500, divide 25% by 100 to get 0.25. Then multiply 0.25 by 500 to get 125. The total number is 125.
It is important to remember that percentages are based on a whole, which is usually 100. Therefore, to use percentages to calculate a total number, it is necessary to first convert the percentage to a decimal fraction by dividing it by 100. Then, multiply the total number by the decimal fraction to calculate the total number.
36 cards is 4% of the total cards sold for Mother's Day.
Total number of cards = 36 / 4%
Total number of cards = 36 x 100/4
Total number of cards = 900 cards.
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Which of the following is a statistical question that can result in numerical data?
A. How many miles do you ride your bike each week?
B. How many miles do the students in your class run each week?
C. Who is the dentist at Uptown Dentistry?
D. How many pets do your grandparents have?
The option that is a statistical question is how many miles do the students in your class run each week? (option b)
What is a statistical question?A statistical question is a question that can be answered by collecting data that have varying values.
For example, the number of miles that the students in your class run each week is statistical question because each student would run. This is because data would be collected from more than one student and the students would have varying miles that they run.
The number of pets your grandparents have is not a statistical questions because they can only have a set number of pets.
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Answer:
B. How many miles do the students in your class run each
Step-by-step explanation:
The histograms display the frequency of temperatures in two different locations in a 30-day period.
A graph with the x-axis labeled Temperature in Degrees, with intervals 60 to 69, 70 to 79, 80 to 89, 90 to 99, 100 to 109, 110 to 119. The y-axis is labeled Frequency and begins at 0 with tick marks every one unit up to 16. A shaded bar stops at 2 above 60 to 69, at 4 above 70 to 79, at 12 above 80 to 89, at 6 above 90 to 99, at 4 above 100 to 109, and at 2 above 110 to 119. The graph is titled Temps in Desert Landing.
A graph with the x-axis labeled Temperature in Degrees, with intervals 60 to 69, 70 to 79, 80 to 89, 90 to 99, 100 to 109, 110 to 119. The y-axis is labeled Frequency and begins at 0 with tick marks every one unit up to 16. A shaded bar stops at 2 above 60 to 69, at 4 above 70 to 79, at 9 above 80 to 89, at 9 above 90 to 99, at 4 above 100 to 109, and at 2 above 110 to 119. The graph is titled Temps in Flower Town.
When comparing the data, which measure of variability should be used for both sets of data to determine the location with the most consistent temperature?
IQR, because Desert Landing is skewed
IQR, because Desert Landing is symmetric
Range, because Flower Town is skewed
Range, because Flower Town is symmetric
Range provides a precise measurement of variability for both sets of data because it compares the greatest and lowest values in a dataset.
It is a helpful measure of variability for comparing the constancy of temperature between Desert Landing and Flower Town because it is unaffected by skewness or symmetry.
A Histogram: What Is It?The graphic representation of data points arranged into user-specified ranges is called a histogram.
The histogram, which resembles a bar graph in appearance, condenses a data series into an intuitive visual by collecting numerous data points and organizing them into logical ranges or bins.
A histogram is a visual depiction of data distribution in statistics. The histogram is shown as a collection of neighboring rectangles, where each bar represents a certain type of data. Numerous fields use statistics, which is a branch of mathematics.
In a bar graph, the frequency is represented by the length of each bar, which are ranked from longest to shortest. To illustrate the relationship between two sets of data, scatter plots plot observations as points.
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pls pls pls help the second photo is the answer choices given
Answer
see attached
Step-by-step explanation:
x-2y = 8 means x = 8+2y. so when y =0, x = 8; when y=1, x =10. draw a line with these 2 points.
Same with x - 2y = 4 ==> x = 4+2y. so when y=0, x = 4, when y=1, x=6, draw a line with these 2 points.
What is the quotient of 7.584x 10^6 and 7.9x 10^2
Answer: the quotient is 957.07 x 10^4 which is equivalent to 957,070
Step-by-step explanation:
the equation above can be used to model the population, in thousands, of a certain city t years after 2000. according to the model, the population is predicted to increase by 0.5% every n months. what is the value of n ?
The value of n=36 months.
It is given that the population is predicted to increase by 0.5%. To know the value after the increment, 215 has to be multiplied by (1 + 0.005) or 1.005.
In the equation P = 215(1.005)t/3, the value of t/3 has to be equal to 1 for a 0.5% increase.
The population increases by 0.5 % every n month.
Initial Population = 215
Final Population:
=215+215*0.5/100
=215.1.074
=216.074
Substituting the value of, Initial and final Population
[tex]216.075=215*(1.005)^\frac{t}{3} \\\\(1.005)^\frac{t}{3} =\frac{216.075}{215}\\ \\(1.005)^\frac{t}{3}(1.005)^1\\\\\\frac{t}{3} =1[/tex]
t=3 years=>36 months.
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The Students Athletes Club has a monthly budget ofxdollars. Every month $500 is spent on transportation. One-fourth the remaining budget is spent on monthly activities. Which function can be used to find the amount in dollars spent on monthly activities?
The function to find the amount in dollars spent on monthly activities can be represented as: A(x) = (x - 500) * 1/4
Let x be the total monthly budget in dollars and A(x) be the function of x that determines the amount in dollars spent on monthly activities.
To find the value of A(x), we follow the steps:
First, we subtract the fixed monthly transportation cost of $500 from the total budget.
The remaining budget is then divided by 4 to find the amount spent on monthly activities.
Therefore, the function A(x) can be written as: A(x)= (x-500)/4
Thus, the function (x - 500) * 1/4 can be used to find the amount in dollars spent on monthly activities.
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John is starting a roofing business. He will need to buy a truck and some supplies to get his business going. The truck costs $13000 used. He gets three jobs right away. And hires 2 workers to help him. The materials for all three jobs cost $3000 total. The jobs will each take a week not including Saturday and Sunday and he pays his workers $125 per day per worker. How much will he have to charge for each job in order to break even at the end of the third job?
As per the unitary method, the charge for each job in order to break even at the end of the third job is $3,000
In math the term unitary method is known as a single unit and then multiply the value of a single unit to the number of units to get the necessary value.
Here we have given that John is starting a roofing business. He will need to buy a truck and some supplies to get his business going.
And here we we have also known as the truck costs $13000 used.
The value of truck is 13000 and material for all 3 jobs is 3000
Here we have also know that each job takes 5 days for a total of 15 days
workers get paid 125 dollars a day.
As we all know that each worker gets 125 a day.
Then here we have also know that each job requires 5 days so he pays each worker 625 per job.
Then he has them work on 3 jobs, and then he pays each worker 1875 for all 3 jobs.
Where here he has 2 workers so he pays out 3750 in total to the workers for all 3 jobs.
Then the total cost is calculated as,
=> $13,000 for the truck
=> $3,000 for the material
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How many solutions can be found for the system of linear equations represented on the graph?
Responses
A one solutionone solution
B no solutionno solution
C infinitely many solutionsinfinitely many solutions
D two solutions
The graph has (c) infinitely many solutions
How to determine the number of solutionsFrom the question, we have the following parameters that can be used in our computation:
The graph
On the graph, we have two equations represented by
y = x + 2
-3x + 3y = 6
On the graph, we can see that the equations have the same line
This means that there are lots of solutions in the system i.e. infinite many solutions
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The table shows the relationship between r and s, where s is the independent variable 1 2 3 3 4 5 6 1 6 هما الا 1 2 2 3 5 6 1 Which equation represents the relationship between r and s? F. Os = GOr=8- 6 HOs=r- 1. Or = 1/2
The relationship between r and s represents by the equation r = 1/6 s. So the option D is correct.
We have to determine which equation represents the relationship between r and s.
When we analysis the table we see that
r(1) = 1 × 1/6 = 1/6
r(2) = 2 × 1/6 = 1/3
r(3) = 3 × 1/6 = 1/2
r(4) = 4 × 1/6 = 2/3
r(5) = 5 × 1/6 = 5/6
r(6) = 6 × 1/6 = 1
So we can say that
r = s × 1/6
So, r = 1/6 s
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The complete question is:
The table shows the relationship between r and s, where s is the independent variable.
s 1 2 3 4 5 6
r 1/6 1/3 1/2 2/3 5/6 1
Which equation represents the relationship between r and s?
A. 1/6 r
B. s - 5/6
C. r - 5/6
D. r = 1/6 s
Someone please help! I'm in Algebra 1 and this is supposed to be a puzzle.
a^x a^y = a^88 x and y differs by 32
The solution of the system is x = 60 and y = 28.
What is the system of equations?One or many equations having the same number of unknowns that can be solved simultaneously called as simultaneous equation. And simultaneous equation is the system of equation.
Given:
An algebraic equation,
[tex]a^{x} a^{y} = a^{88}[/tex]
When the base value is the same, we can add the exponents.
x + y = 88
And x - y = 32
Now, we have the system of equations,
Adding both the equations,
2x = 120
x = 60
And y = 28.
Therefore, the values are x = 60 and y = 28.
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How do you eliminate the parameter to find a cartesian equation of the curve?
A horizontal parabola with a right-facing opening and a vertex at (1,1) is we have positive direction.
In order to make the coefficients of either the variable x or the variable y numerically equal, first multiply both of the following equations by any suitable non-zero constants.
Finding the single equation of a curve in standard form with only the variables xs and ys constitutes the cartesian equation of that curve. You must simultaneously solve the parametric equations in order to arrive to this equation.
X and Y both
are t-related functions.
We have t=y1 after solving y=t+1 to get t as a function of y.
Thus, given x=t2+1, we have x=(y1)2+1x1=(y1) by substituting t=(y1).
A horizontal parabola with a right-facing opening and a vertex at (1,1) is what we have positive direction.
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Write a function g that determine's the point's x-coordinate in terms t.
g(t)=
A function g that determine the point's x-coordinate in terms t.
g(t) = r .cos (2.t).
Now, According to the question:
The input variable and output variable are also called the domain and the range. The domain of a function is the set of all values that will work in the function, which are the inputs. The range of a function is the set of all possible outputs produced by the function. In the example above, the 3 would be part of the range and the 8 would be part of the domain.
Input data
A point started at the location (-4, 0)
and, moves CCW along a circle centered at (0, 0)
angular speed = 2 rad/s
Procedure
The value of x is equal to the cosine of the swept angle time radius.
We can calculate the swept angle as 2×t
g(t) = r .cos (2.t).
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The given question is incomplete.
For the complete question, To see the attachment.
The table represents a linear relationship. x −1 0 1 2 y 2 0 −2 −4 Which of the following graphs shows this relationship? Group of answer choices graph of a line passing through the points negative 2 comma negative 4 and 0 comma 0 graph of a line passing through the points negative 2 comma negative 1 and 0 comma 0 graph of a line passing through the points negative 2 comma 4 and 0 comma 0 graph of a line passing through the points negative 2 comma 1 and 0 comma 0
The graph of the linear function y = -2x is given by the image presented at the end of the answer.
How to define the linear function?The slope-intercept definition of a linear function is given as follows:
y = mx + b.
In which:
m is the slope, representing the rate of change.b is the intercept, representing the value of y when x = 0.From the table, when x increases by 1, y decays by 2, hence the slope m is given as follows:
m = -2.
When x = 0, y = 0, hence the intercept b is given as follows:
b = 0.
Hence the function is:
y = -2x.
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Two pools are being filled with water. To start, the first pool contains 1600 liters of water and the second pool contains 1186 liters of water. Water is being added to the first pool at a rate of 20.25 liters per minute. Water is being added to the second pool at a rate of 31.75 liters per minute. After how many minutes will the two pools have the same amount of water? How much water will be in each pool when they have the same amount?
At 36 minutes, the amount of water in both pools will be same. In amount, it will be 2329 liters.
What are algebraic expressions?In mathematics, an expression or mathematical expression is a finite combination of symbols that is well-formed according to rules that depend on the context.Mathematical symbols can designate numbers (constants), variables, operations, functions, brackets, punctuation, and grouping to help determine order of operations and other aspects of logical syntax.Given is that two pools are being filled with water. To start, the first pool contains 1600 liters of water and the second pool contains 1186 liters of water. Water is being added to the first pool at a rate of 20.25 liters per minute. Water is being added to the second pool at a rate of 31.75 liters per minute.
We can write the equation for the first pool as -
y{A} = 1600 + 20.25x
Similarly, for the second pool is -
y{B} = 1186 + 31.75x
For the same amount of water -
y{A} = y{B}
1600 + 20.25x = 1186 + 31.75x
1600 - 1186 = 31.75x - 20.25x
x = 36
Amount of water in each pool will be -
y = 1600 + 20.25 x 36
y = 2329 liters
Therefore, at 36 minutes, the amount of water in both pools will be same. In amount, it will be 2329 liters.
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Solve for x and the missing angles in the diagram below: x = The missing angles are °, ° and °.
The measure of {x} equals to 8 and ∠WYZ is 32°.
What is a radian?The radian is the unit of angle in the International System of Units and is the standard unit of angular measure used in many areas of mathematics
Given is the figure as shown in the image.
It is given that ∠XYZ = 106°. We can write -
∠XYZ = ∠XYW + ∠WYZ
106 = 70 + 5x - 4
5x + 66 = 106
5x = 40
x = 8
∠WYZ = 5x - 8 = 5 x 8 - 8 = 32°.
Therefore, the measure of {x} equals to 8 and ∠WYZ is 32°.
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please help this is for geometry
how would i solve for x here
Using the leg rule, the value of x in the right triangle is: 42.
What is the Leg Rule?The leg rule gives the relationship between the lengths of the segments formed on the hypotenuse of a right triangle by its altitude.
The leg rule is given as:
Hypotenuse/leg = leg/part.
In the image given, we have:
Hypotenuse = x + 8
Leg = 20
Part = 8
Plug in the values:
x + 8 / 20 = 20 / 8
8(x + 8) = (20)(20)
8x + 64 = 400
8x = 400 - 64
8x = 336
x = 336/8
x = 42
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solve the equation:(x+5)^4 = 81
Answer:4√81=±3
Step-by-step explanation:
If (x+5)^4 = 81,
then (x+5)^2 = ± sqrt(81), so
(x+5)^2 = ±9
Focusing on (x+5)^2 = 9 for the two real roots, we have
(x+5)^2 = 9
x+5 = ± sqrt(9)
x+5 = ± 3
x+5 = 3 gives you x = -2
x+5 = -3 gives you x = -8
There are two complex roots too, but I'm not sure if you're studying that too. If so, then you'd solve (x+5)^2 = -9:
x+5 = ± sqrt(-9)
x+5 = ±3i
x = 5 ± 3i as the two complex roots.
What is the length of the unknown side on the following right triangle?
Answer: c=√202
Step-by-step explanation:
c = √(9² + 11²)
which also simplifies to 23.769729
I hope this helps!
Answer:
Step-by-step explanation:
Can someone help me with this please? I need help ASAP
A: Classify the triangle above by its sides
B: Classify the triangle above by its angles
C: Explain your answer to part a and b
PLEASE HURRY LIMITED TIME TEST QUESTION!!!!
Question Write the standard form equation of a circle given the center of (-7, -15) and an area of A = π. Show all work for your calculations using the equation editor.
The equation of the circle into the standard form will be (x + 7)² + (y + 15)² = 1.
What is the equation of a circle?It is the close curve of an equidistant point drawn from the center. The radius of a circle is the distance between the center and the circumference.
Let r be the radius of the circle and the location of the center of the circle be (h, k). Then the equation of the circle is given as,
(x - h)² + (y - k)² = r²
The area of the circle is 9π. Then the radius of the circle is given as,
A = π
πr² = π
r² = 1
The center of the circle is at (-7, -15). Then the equation of the circle is given as,
(x + 7)² + (y + 15)² = 1
The equation of the circle into the standard form will be (x + 7)² + (y + 15)² = 1.
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To indirectly measure the distance across a river, Fatoumata stands on one side of the river and uses sight-lines to a landmark on the opposite bank. Fatoumata draws the diagram below to show the lengths and angles that she measured. Find PR, the distance across the river. Round your answer to the nearest foot.
The distance PR across the river is 177 feet
How to determine the distance PRThe complete question is added as an attachment
From the question, we have the following parameters that can be used in our computation:
The equivalent ratio represented as
PR : 125 = PR + 170 : 245
Express the ratio as a fraction
So, we have the following representation
PR/125 = (PR + 170)/245
Cross multiply
This gives
245PR = 125PR + 21250
Evaluate the like terms
120PR = 21250
Divide both sides by 120
PR = 177
Hence, the distance is 177 feet
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How much material would be required to make one triangular sail for a sailboat if the base is 420 centimetres and the altitude is 653 centimetres?
Answer:
Step-by-step explanation:
I don't know I'm just asking the question
A lighthouse 1 flaahes its light every 15 minutes. A lighthiuse 2 flaahes every 18 minutes. If the two lighthouse flaah togethwr at 1:00 A. M, what time they will next flash together
The next time they will flash together will be at 4:00 AM.If they flash together at 1:00 AM.
According to the given information we are trying to find the smallest time interval at which both the lighthouses will flash together.The first lighthouse flashes every 15 minutes, and the second lighthouse flashes every 18 minutes.
To find the LCM of 15 and 18, we can list out the multiples of each number and find the smallest multiple that is common to both.
Multiples of 15: 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, ...
Multiples of 18: 18, 36, 54, 72, 90, 108, 126, 144, ...
As we can see, the smallest multiple that is common to both lists is 90. This means that the two lighthouses will flash together every 90 minutes.Since they both flash at 1:00 AM, we can add 90 minutes to 1:00 AM to find the next time they will flash together:
1:00 AM + 90 minutes = 4:00 AM
So, the next time they will flash together will be at 4:00 AM.
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I need help. need answer I have one more try
Answer:
1/7
Step-by-step explanation:
5/7 was already traveled so that leaves 2/7.
Thye traveled 1/2 of 2/7 so we multiply them.
1/2 x 2/7 = 2/14
We can simplify this by dividing both sides by 2.
1/7 is the final answer.
Jackson is working two summer jobs, making $10 per hour washing cars and $12 per hour landscaping. Last week Jackson worked a total of 14 hours and earned a total of $152. Determine the number of hours Jackson worked washing cars last week and the number of hours he worked landscaping last week
The number of hours Jackson worked washing cars last week is 8 hours
The number of hours Jackson worked landscaping cars last week is 6 hours
How to write the required equationThe problem is a simultaneous equation of two unknowns with two equations.
The equations are formed as follows
Jackson worked a total of 14 hours
let the washing cars be x and landscaping be yx + y = 14
Jackson earned a total of $152
$10 per hour washing cars and $12 per hour landscaping
10x + 12y = 152
The simultaneous equation
x + y = 14
10x + 12y = 152
using calculator to solve the equation we have that
x = 8 and y = 6
hence hours of washing cars is 8 hours while hour s of landscaping is 6 hours
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The mass of a 45. 750 g piece of copper is measured four times on two different balances with the following results: Trial Balance 1 (g) Balance 2 (g) 1 45. 747 45. 76 2 45. 748 45. 74 3 45. 744 45. 73 4 45. 745 45. 77 a) Calculate the mean, deviation, % relative deviation, absolute error, and % relative error. Show all Work. B) Which balance is more precise
The mean of the copper measured is 45.747. when the mass of copper is 45.750.
Average Absolute Deviation:
The average deviation is a statistic that measures the absolute difference of each measurement from the mean value and then gets its average.
It also includes both the mean absolute deviation and the median absolute deviation and also defines the data set as the average of the absolute deviations from a central point.
This is given by the formula:
Average Deviation=∑ni=1|x−¯x|
where:
x is the observed value
¯x is the mean value
n is the number of observations
Computing for the mean of balance 1:
¯x=45.747+45.745+45.748/3
¯x=45.747
Computing for the mean of balance 2:
¯x=45.76+45.77+45.74/3
¯x=45.79
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DE is
midsegment of AABC. Find the value of x
B
X
The value of x in the triangle is 8 units.
How to find the mid segment of a triangle?The midsegment of a triangle is a line connecting the midpoints between two sides of a triangle.
It is parallel to the third side and it is half the length of the third side.
Therefore, DE is the mid segment of the triangle ABC. The value of x can be found as follows:
Using the mid segment rule,
BE = EC
BD = DA
Therefore,
x = 8 units
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