Mr. Shaw graphs the function f(x) = –5x + 2 for his class. The line contains the point (-2, 12). What is the point-slope form of the equation of the line he graphed?
a.) y – 12 = –5(x + 2)
b.) y – 12 = 2(x + 2)
c.) y + 12 = 2(x – 2)
d.) y + 12 = –5(x – 2)
Answers
y-y1=m(x-x1)
where x1 and y1 are coordinates of the given point.
in f(x) = -5x + 2 we can see that slope is -5
m = -5
if we exchange all of this in point slope formula we get:
y - 12 = -5(x - (-2)) = -5(x+2
Answer is a)
Related Questions
Business: the charge on isongs is $4.50 per song. for his birthday, jason is allowed to spend at most $50 worth of music. write the inequality that describes how many songs he can buy; then solve the equation
Answers
We know that $4.50 is for one song, since we don't know how many songs we can have 'x' represent the number of songs. Finally it ends up being $50 dollars, more than likely, so... from what I would draw it would be:
$4.50x = $50 ~ Divide $4.50 by both sides.
x = 11.1 (Estimated) ~ Roughly indicating that only 11 songs can be bought.
I hope that helps in someway, have a great rest of your day! ^ ^
{-Ghostgate-}
P.S. Considering that I'm not sure how they would want you to write it, this could be wrong. However it still gives you the proper answer.
Write the following statement in if - then form.
Two opposite rays form a straight line.
Which of the following is the hypothesis?
1. if two rays are opposite
2. if a straight line is formed
3. then rays are opposite
Answers
The first option is correct:
1.) if to rays are opposite.
A popular video game claims that the average time needed to reach level 10 Paladin is 3 hours with a standard deviation of 0.4 hours. James thinks that he and his four friends are more skilled than the average gamer because it took them an average of only 2.5 hours. Which of the following is the most restrictive level that would validate his claim?
a. 1%
b. 2.5%
c. 5%
d. 10%
Answers
Answer:
a
Step-by-step explanation:
1%
Final answer:
The z-score calculation for James and his friends' gaming performance indicates that their claim would be validated at even the most restrictive level of significance, which is 1%.
Explanation:
To determine which level of significance validates James and his friends' claim of being more skilled gamers, we use the concept of hypothesis testing in statistics. Given that the average time to reach level 10 Paladin is 3 hours with a standard deviation of 0.4 hours, and James and his friends have an average of 2.5 hours, we can calculate the z-score to see how many standard deviations their average is from the population mean.
The formula for the z-score is: Z = (X - μ) / (σ / √n), where X is the sample mean, μ is the population mean, σ is the standard deviation, and n is the sample size. Plugging in the values, we get:
Z = (2.5 - 3) / (0.4 / √5) = -6.25
This z-score is significantly below the mean. Looking at the z-table, a z-score of -6.25 falls well beyond the typical critical values for common levels of significance (1%, 2.5%, 5%, and 10%). Thus, James's claim would be validated at even the most restrictive level.
Therefore, the answer is:
a. 1%
Choose one of the factors of x15 − 64. (2 points)
x^5 − 4
x^10 − 4x^5 + 16
x^10 − 4
x^15 + 8x + 16
Answers
We have been given the function [tex]x^{15}-64[/tex]
Convert this expression in difference of cubes form.
[tex]x^{15}-64\\=(x^5)^3-4^3[/tex]
Now, in order to find the factors, we can apply the difference of cubes form, which is given by
[tex]x^3-y^3=(x-y)(x^2+xy-y^2)[/tex]
On applying this formula, we get
[tex](x^5-4)(x^{10}+4x^5+16)[/tex]
Hence, the factors of the given expression are
[tex](x^5-4) \text{ and }(x^{10}+4x^5+16)[/tex]
Out of the given option, A is the correct option.
x^5 − 4 is the required factor.
The factors of the polynomial [tex]x^{15}-64[/tex] are [tex]x^{5}-4[/tex] and [tex]x^{10}+4x^{5}+16[/tex].
Given data:
The polynomial equation is represented as [tex]f(x)=x^{15}-64[/tex].
On simplifying the equation:
[tex]f(x)=[x^{5}]^{3}-4^{3}[/tex]
From the difference of cubes:
[tex]x^{3}-y^{3}=(x-y)(x^{2}+xy-y^{2})[/tex]
Substituting the values in the equation:
[tex][x^{5}]^{3}-4^{3}=(x^{5}-4)(x^{10}+4x^{5}+16)[/tex]
Hence, the factors of the equation is [tex]x^{5}-4[/tex].
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if there is a 30% chance of sun tomorrow and a 20% chance of wind and no sun, what is the probability that it is windy, given that it is not sunny? Round your answer to the nearest percent.
A. 44%
B. 29%
C. 22%
D. 57%
Answers
You know there's a 20% chance of wind and no sun.
And there must be a 70% chance of no sun. Since there's a 30% chance of sun
If you divide 0.20 / 0.70 you get .2857 which rounds to 29%.
Answer:
B. 29%
Step-by-step explanation:
if there is a 30% chance of sun tomorrow and a 20% chance of wind and no sun.
what is the probability that it is windy, given that it is not sunny.
A: it is not sunny
P(A)=0.7 (since, chance of being sunny=30% then chance of not being sunny=70%)
B:it is windy
A∩B:it is windy and not sunny
P(A∩B)=0.2 (chance=20%)
B/A:it is windy given that it is not sunny
Baye's theorem states that:
P(A∩B)=P(B/A)×P(A)
0.2=P(B/A)×0.7
⇒ P(B/A)= 2/7=0.286
≈ 29%
Hence, probability that it is windy, given that it is not sunny is:
B. 29%
Abdul is making a map of his neighborhood. He knows the following information:
His home, the middle school, and high school are all on the same street.
His home, the elementary school, and his friend's house are on the same street.
The distance between his home and the middle school is 3 miles.
The distance between his high school and the middle school is 6 miles.
The street between the middle school and elementary school is parallel to the street between his friend's home and the high school.
What theorem can Abdul use to determine the remaining distances for his map?
Pythagorean Theorem
Midsegment Theorem
Triangle Proportionality Theorem
Side-Angle-Side Similarity Theorem
Answers
Answer:
Triangle Proportionality Theorem
Step-by-step explanation:
Just took the test xD
Abdul can use the Pythagorean Theorem to calculate the straight-line distances on his map, utilizing the formula a² + b² = c² for right triangles created by the intersections of his neighborhood's streets.
To determine the remaining distances for his map, Abdul can apply the Pythagorean Theorem. The streets in question form right angles at their intersections, as implied by the parallel streets mentioned. Thus, if Abdul needs to find the distance between two points that form a right angle with another point (essentially creating a right triangle), he can use the formula a² + b² = c², where a and b are the legs (sides forming the right angle) of the triangle and c is the hypotenuse (the side opposite the right angle).
For example, if Abdul wants to find the straight-line distance (hypotenuse) between his home and the high school, and he knows the distance to the middle school (3 miles) and the distance from the middle school to the high school (6 miles), he can use the Pythagorean Theorem to calculate this. Assuming his home, the middle school, and the high school form a right triangle, the formula becomes: 3² + 6² = c², which after calculations gives c =
√(3² + 6²).
Therefore, the correct answer is pythagoras theorm.
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I've been waiting 4 hours for help answering this. I need help
The formula for rate is r=dt.
Solve for d.
Enter your answer in the box.
Answers
r=dt
------ (All I did was divide both sides by t, so that d is alone!)
t
ft=d would be the final solution.
The results of a survey show that the percent of adults in a certain town who want to change the name of the town is in the interval . What is the point estimate for the percent who want to change the town’s name? What is the poll’s margin of error? Do you think the town is most likely to change its name? Which statistic influenced your answer the most? Explain.
Answers
The diagonals of a square are _____.
A. perpendicular
B. never congruent
C. parallel
D. sometimes equal
Answers
A. Perpendicular
The diagonals of a square are perpendicular to each other. Thus, the correct option is A.
What is a square?It is a polygon with four sides. The total interior angle is 360 degrees. A square's opposite sides are parallel and equal, and each angle is 90 degrees. Its diagonals are all the same length and intersect in the center.
If the angle between the diagonals of the quadrilateral is not equal to the right angle, then the quadrilateral is a rectangle, parallelogram, or trapezoid.
If the angle between the diagonals of the quadrilateral is equal to the right angle, then the quadrilateral is a rhombus and square.
The diagonal of the square intersects at the right angle. Then the diagonals of a square are perpendicular to each other.
Thus, the correct option is A.
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Calculate the average rate of change for the given graph from x = –2 to x = 0 and select the correct answer below.
A.) -2
B.) 2
C.) 3
D.) 6
Answers
f(x = -2) = 0
f(x = 0) = 6
Avg = 6 / 2 = 3
Answer is C
We have to use absolute valuee for x distance because distance between x1 and x2 cannot be negative it can only be positive.
Answer:
3
Step-by-step explanation:
Which of the following shows the correct value of 50
A. 4 < 50 < 5
B. 7 < 50< 8
C. 8 <50 < 9
D. 10 < 50 < 11
Answers
Answer:
None of the options is correct
Step-by-step explanation:
It is important to know that he expression a < x < b means that x is greater than a and less than b. So, for finding the correct value let's analyse each option.
A. 4 < 50 < 5
50 is greater than 4 but it is not less than 5, so, option A is incorrect.
B. 7 < 50 < 8
50 is greater than 7 but it is not less than 8, so, option B is incorrect.
C. 8 < 50 < 9
50 is greater than 8 but it is not less than 9, so, option C is incorrect.
D. 10 < 50 < 11
50 is greater than 10 but it is not less than 11, so, option D is incorrect.
Thus, none of the options is correct.
The correct inequality that should show the value of 50 is 49 < 50 < 51, but based on the provided options and context, all are incorrect. If choosing the closest correct answer, it would be 'C. 8 < 50 < 9', acknowledging that it is still incorrect because 50 is not less than 9. Hence, option C.
The student's question is about determining the correct inequality that shows the value of 50 within two consecutive integers. When comparing numbers, we need to find two consecutive integers between which the number 50 falls. The correct inequality that illustrates this is D. 10 < 50 < 11, as 50 is greater than 10 and less than 11. Considering context, this seems to be a typo, since 50 cannot be between 10 and 11. The correct answer should logically be none of the above, as 50 is actually between 49 and 51, making all the provided options incorrect. However, if the intention was to find which of the provided options is closest to being correct, then the answer would be C. 8 < 50 < 9, as 50 is greater than 8 but certainly not less than 9. It is important to note that this question involves an error in the provided options.
Krystal bought a refrigerator from a rental center for $1,050. She makes 16 monthly payments of $112.75 with her credit card. The rental center charges $1.25 for every payment made with a credit card. What is the total cost of the refrigerator?
$1,050
$1,804
$1,824
$2,052
Description
SubmitToggle Dropdown
Answers
Let
n--------> number of monthly payments
x-------> amount of monthly payments with Kristal's credit card
y-------> charges for every payment made with a credit card
T-------> total cost of the refrigerator
we know that
[tex] n=16\\x=\$112.75\\ y=\$1.25\\[/tex]
the total cost of the refrigerator is equal to
[tex] T=n(x+y) [/tex]
substitute the values in the formula
[tex] T=16*(112.75+1.25) [/tex]
[tex] T=16*114 [/tex]
[tex] T=\$1,824 [/tex]
therefore
the answer is
the total cost of the refrigerator is equal to [tex] \$1,824 [/tex]
When solving a system of equations, how do you determine which method to use? (substitution, elimination, graphing)
Answers
What is 20 time 4 equal?
Answers
hope this helps you
the Museum of Science in Boston displays a running total of the U.S. population. on may 11, 1993, the total was increasing at the rate of 1 person every 14 sec. the displayed population figure at 3:45 PM. that day was 257,313,431. assume that the relative growth rate is constant.
A) what is the relative growth rate per year (365 days)?
B) at this rate, what will the U.S population be at 3:45 Pm Boston tiem in May 11, 2001
Answers
use the formula C=(1+r)^x
The relative growth rate per year is approximately 22521.43 people per year. The U.S. population at 3:45 PM Boston time on May 11, 2001, will be approximately 275,333,002 people.
Explanation:The relative growth rate per year can be found by converting the rate of 1 person every 14 seconds to the rate per year. There are 60 seconds in a minute, 60 minutes in an hour, and 24 hours in a day, so there are 60 * 60 * 24 = 86400 seconds in a day. There are 365 days in a year, so the rate per year is (1 person / 14 seconds) * (86400 seconds / 1 day) * (365 days / 1 year) = 22521.4286 people per year. Therefore, the relative growth rate per year is approximately 22521.43 people per year.
To determine the U.S. population at 3:45 PM Boston time on May 11, 2001, we need to calculate the number of seconds between May 11, 1993, and May 11, 2001, at 3:45 PM. There are 365 days in a year and 24 hours in a day, so there are 365 * 24 = 8760 hours in a year. Since May 11, 1993, to May 11, 2001, is 8 years, there are 8 * 8760 = 70080 hours between the two dates. There are 60 minutes in an hour and 60 seconds in a minute, so there are 60 * 60 = 3600 seconds in an hour. Therefore, there are 70080 * 3600 = 252288000 seconds between the two dates. The population increase rate is 1 person every 14 seconds, so the population increase during this time period is 252288000 / 14 = 18020571.43 people. Adding this to the initial population of 257,313,431 gives a total population of 257,313,431 + 18020571.43 = 275,333,002.43. Therefore, the U.S. population at 3:45 PM Boston time on May 11, 2001, will be approximately 275,333,002 people.
Calculate dy/dx
You need not expand your answer.
y=3x^2-9x+13/2x+4 ...?
Answers
The quotient rule is ( f'(x)g(x)-f(x)g'(x) )/ (g(x))^2 {complex written on 1 line I know}
let f(x)=9x +13 and g(x)=2x+4
f'(x)=9 and g'(x)=2
therefore just substitute the equations in.
y'= 6x - ((9(2x+4)-2(9x+13))/((2x+4)^2))
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what is the solution to this inequality?
x/4 < 12
A. x < 48
B. x < 3
C. x > 3
D. x > 48
Answers
X>48 is the correct answer :)
multiply both sides by 4,
4x/4 < 12*4
x < 48
so, option A is your answer
hope this helps!
conjugate of 8+4i ...?
Answers
64 - 16i^2 / 8 - 4i
64 - 16 ( - 1 ) / 8 - 4i
64 + 16 / 8 - 4i
80 / 8 - 4i
10 - 20i
α + βi
is
α - βi
So the conjugate of
8 + 4i
is
8 - 4i
what is 13 over 20 in simplest form
Answers
A rectangle is inscribed with its base on the x-axis and its upper corners on the parabola y=7-x^2 .
What are the dimensions of such a rectangle with the greatest possible area?
Answers
the area of a rectangle = length * width
thus, area = x*(7-x^2)= 7x-x^3
in order to maximize the area, you would need to take the derivative of the area and set it equal to 0
Area = 7x-x^3Area' = 7 - 3x^2
7-3x^2 = 0thus, x = 1.5275
this x represents the x needed to create the largest possible area with the given parameters.
Thus:Width (x-axis) = 1.5275Length (y-axis) = 7 - (1.5275)^2 = 4.6667
The rectangle with the maximum area that can be inscribed within the parabola y=7-x^2 has dimensions length 2√(7/3) and height 14/3.
Explanation:The problem is asking to find the dimensions of a rectangle inscribed within a parabola with maximum area. This is an example of an optimization problem in calculus. Here, the parabola given by y=7-x^2 suggests that the rectangle's corners on the x-axis lie at (-x, 0) and (x, 0). The corners on the parabola would be located at (-x, 7-x^2) and (x, 7-x^2). The dimensions of the rectangle would be 2x for the length (base) and 7-x^2 for the height.
For the maximum area, we need to take the derivative of the area function A = length*width = (2x)*(7-x^2) and set it equal to zero, thus defining the critical points.
The derivative of A is given by A' = 14 - 6x^2. Setting A' equal to zero gives: x = √(14/6) which simplifies to x = √(7/3).
Finally, as we are looking for the dimensions of the rectangle, the length (base) is 2*x = 2√(7/3) and the height is given by y = 7 - x^2 = 7 - (7/3) = 14/3.
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2 4/15 divided by 2 2/5
Answers
what is the square root of 8k=k
Answers
(x-2)(x+2) Find The Product?
Answers
(x-2)*(x+2) = x*x + x*2 - 2*x - 2*2
(x-2)*(x+2) = x^2 + 2x - 2x - 4
(x-2)*(x+2) = x^2 - 4
That's the long way to do it. You can use the difference of squares formula as a shortcut
(a-b)*(a+b) = a^2 - b^2
(x-2)(x+2) = x^2 - 2^2
(x-2)(x+2) = x^2 - 4
either way, the final answer is x^2 - 4
So use "f.o.i.l" meaning you multiply each first term, the outside terms, the inside terms and last terms, and then add. You'd get x^2-4 in this example
what is 100 x 100 ...............
Answers
The product of the given multiplication is 10000.
What is multiplication?Multiplication is when you take one number and add it together a number of times.
Example: 5 multiplied by 4 = 5 + 5 + 5 + 5 = 20.
Given that, multiply 100 x 100,
100 x 100 = 10000
Hence, the product of the given multiplication is 10000.
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A department store is having a 30% off sale for all clothing items. what is the discount price of a pair of blue jeans that normally cost $39.99?
Answers
39.99-11.99=$28
1. (with a calculator) You do 39.99 × 0.3 = 11.997.
Then, 39.99 - 11.997 = $27.993, or $27.99.
2. (without a calculator). You have to figure out 30% of 39.99, so you divide it by 10 to get 10%, which is 3.999, and then multiply by 3 to get 30%, which is 11.997. Then, same as in the first way, you do 39.99 - 11.997 = $27.99.
Hope this helps!
the three sides of a triangle have lengths 3x, 2x+4, and 5x-8. Find the value of x that makes the triangle equilateral.
Answers
Answer:
x=4
Step-by-step explanation:
The value of x that makes the triangle equilateral is 4
How to determine the valueFor an equilateral triangle, all three sides must be equal in length. In this case, the sides are represented by 3x, 2x + 4, and 5x - 8.
To find the value of x that makes the triangle equilateral, set up an equation:
3x = 2x + 4 = 5x - 8
Now, solve for x:
3x = 2x + 4.
Subtract 2x from both sides:
x = 4
Now, check if x = 4 satisfies the other two parts: 2x + 4 and 5x - 8.
For 2x + 4:
2(4) + 4 = 8 + 4 = 12
For 5x - 8:
5(4) - 8 = 20 - 8 = 12
Since all three expressions are equal to 12, the value of x = 4 makes the triangle equilateral.
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Jennifer broke open her piggy bank and found 83 coins in nickels and dimes. If she had $6.95 in all, how many coins of each has she?
Answers
Jennifer has 27 nickels and 56 dimes.
Let's use the variables n and d to represent the number of nickels and dimes Jennifer has, respectively.
We can set up two equations based on the given information:
n + d = 83 (equation 1)0.05n + 0.10d = 6.95 (equation 2)Now, we can solve this system of equations.
We can rewrite equation 1 as n = 83 - d and substitute it into equation 2:
0.05(83 - d) + 0.10d = 6.95
4.15 - 0.05d + 0.10d = 6.95
0.05d = 6.95 - 4.15
0.05d = 2.80
d = 2.80 / 0.05
d = 56
Substituting the value of d back into equation 1, we find n = 83 - 56 = 27.
Therefore, Jennifer has 27 nickels and 56 dimes.
simplify completely 3x+18/18 ...?
Answers
So in order to simplify the given value above, what we are going to do is to divide it by 3. So 3 divided by 3x+18/18, and this will give us x+6/6. Hope this answer helps. Other options for this question include x, 3x, and x+18/6.
Kelli is 3 4 as tall as her brother Ted. Write an expression to describe Kelli's height. Ted's height can be represented using the variable x.
Answers
Answer:
Kelli's height = [tex]\frac{3}{4}x[/tex]
Step-by-step explanation:
Here, x represents the Ted's height .
As per the statement:
Kelli is [tex]\frac{3}{4}[/tex] as tall as her brother Ted.
We have to find an expression to describe Kelli's height.
then;
[tex]\frac{3}{4}[/tex] as tall as her brother Ted means [tex]\frac{3}{4}x[/tex]
⇒Kelli's height = [tex]\frac{3}{4}x[/tex]
Therefore, an expression to describe Kelli's height is, [tex]\frac{3}{4}x[/tex]
15 students ask to visit a college admissions counselor. Each visit includes one student. In how many ways can 10 time slots be assigned? ...?
Answers
15 x 14 x 13 x 12 x 11 x 10 x 9 x 8 x 7 x 6 = 10,897,286,400
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