1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
klemol [59]
3 years ago
9

If y varies directly as x^2 and y = 144 when x = 4, what is the value of y when x = -5?

Mathematics
1 answer:
True [87]3 years ago
6 0
As the variation is direct then we have the following expression:
 y = kx ^ 2

 From here, we clear the value of k.
 For this we use the following data:
 y = 144 when x = 4
 Substituting values:
 144 = k4 ^ 2

 Clearing k we have:
 k = 144/4 ^ 2

k = 144/16

k = 9
 Then, the function is:
 y = 9x ^ 2

 When x = -5 we have:
 y = 9 (-5) ^ 2

y = 9 (25)

Y = 225
 Answer:
 
the value of y when x = -5 is:
 
b.
 
225
You might be interested in
Consider the function.
worty [1.4K]

The statement f⁻¹(x) has a y-intercept of (0, –36) and f⁻¹(x) has a range of all real numbers options third and fifth are correct.

<h3>What is a function?</h3>

It is defined as a special type of relationship, and they have a predefined domain and range according to the function every value in the domain is related to exactly one value in the range.

The question is incomplete.

The question is: Consider the function f(x) = (-2/3)x - 24  Which conclusions can be drawn about f⁻¹(x) Select two options:

f⁻¹(x) has a slope of -2/3

f⁻¹(x) has a restricted domain.

f⁻¹(x) has a y-intercept of (0, –36).

f⁻¹(x) has an x-intercept of (–36, 0).

f⁻¹(x) has a range of all real numbers.

f(x) = (-2/3)x - 24

To find the inverse of a function:

interchange the x and y

x = (-2/3)y - 24

y = (-3/2)(x + 24)

y = (-3/2)x - 36

The slope of a function f⁻¹(x) is -3/2

From the graph, we can see the y-intercept is (0, -36) and the range will be all real numbers.

Thus, the statement f⁻¹(x) has a y-intercept of (0, –36) and f⁻¹(x) has a range of all real numbers options third and fifth are correct.

Learn more about the function here:

brainly.com/question/5245372

#SPJ1

3 0
2 years ago
Find the value of x in the triangle below​
stira [4]

Answer:

28

Step-by-step explanation

180=85+67+x

x=28

8 0
3 years ago
BRAINLIEST!!<br><br>which statement correctly compares the function y = 5x + 5
Nimfa-mama [501]

Solved Correct Answer B ( conjucted with association of y= 5x + 5 - Graphed (0,5)

5 0
3 years ago
For each situation below, write the equation of the line and explain how you can tell.
sveticcg [70]

Answer:

see below

Step-by-step explanation:

a. Has a slope of 2 and passes through (10,17)

Using the slope intercept form

y = mx+b  where m is the slope and b is the y intercept

y = 2x+b

Substitute the point into the equation

17 = 2(10)+b

17 = 20+b

Subtract 20 from each side

17-20 =b

-3 =b

y = 2x-3

b. passes through (1,-4) and (2,-5)

First find the slope

m= (y2-y1)/(x2-x1)

   = (-5- -4)/(2-1)

  = (-5+4)/(2-1)

  = -1/1

  = -1

Using the slope intercept form

y = -x+b

Substitute a point into the equation

-4 = -1(1) +b

-4 = -1+b

Add 1 to each side

-3 = b

y = -x+3

   

6 0
3 years ago
Please help!
AfilCa [17]

Answer:

a.) P(HH|C)=2/5

Explanation:

Given following:

  • P(HH) = 7
  • P(C) = 10
  • P(HH ∩ C) = 4
  • P(HH ∪ C) = 13

Solving steps:

\sf P(HH|C) = \dfrac{P(HH \cap C) }{P(C)}

\sf P(HH|C) = \dfrac{4 }{10}

\sf P(HH|C) = \dfrac{2 }{5}

8 0
2 years ago
Other questions:
  • The Minnesota Multiphasic Personality Inventory (MMPI) is one of the most frequently used personality tests in psychology. The c
    11·1 answer
  • ∠ABC is formed by two tangents intersecting outside of a circle. If minor arc AC = 110°, what is the measure of ∠ABC?
    10·2 answers
  • 1+1=2 but 2-1=3 so how does 1+1=2
    14·2 answers
  • Find the value of each variable. <br> I need help only on 3 please
    9·2 answers
  • How to find the volume of a rectangular prism
    15·2 answers
  • Kristin bought three $48.50 shirts at a V2-price sale. Dawn bought three of the
    5·1 answer
  • Which statement describes the solution to the system of equations?
    12·1 answer
  • I need help with this one pls
    15·2 answers
  • Lucy is knitting a blanket and needs to buy some more yarn. At her local craft store, 2 skeins of yarn cost $7 and 8 Skeins of y
    13·2 answers
  • WILL MARK BRAINLIEST IF RIGHT (NO LINKS)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!