The constant of proportionality is k = y/x.....k = 40/200 = 1/5

y = mx + b
slope(m) = 1/5
(200,40)...x = 200 and y = 40
now we sub...we r looking for b, the y int

40 = 1/5(200) + b
40 = 40 + b
40 - 40 = b
0 = b

so ur equation is : y = 1/5x

if pop star earned 800
800 = 1/5x
800 * 5 = x
4000 = x

3 0

3 years ago

The volume of a cube is 27 cubic inches. What is the length of an edge? Explain.

Lilit [14]

Answer:

Step-by-step explanation:

The formula of a volume of a cube:

$V=a^3$

a - length of an edge

We have V = 27 in³. Substitute:

$a^3=27\to a=\sqrt[3]{27}\\\\a=3\ in$

7 0

3 years ago

The derivative of y=2x^2+x+2

Lorico [155]

Answer:

4x + 1

Step-by-step explanation:

y = 2x² + x + 2

dy/dx = 2(2x¹) + 1 + 0

dy/dx = 4x + 1

5 0

4 years ago