She has $5.33 left
$9.00
-$3.67
————
$5.33
(-2x^2)^3 * 3x
3(-8(x^2)^3)x
3(-8x^6)x
3(-8x^7)
-24x^7
Hope this is accurate & helpful! Let me know if I made any errors or if you have any additional questions.
75% of people enjoy rock music.
24÷32 = .75
Ok, so the function form is y = a * bx.
Substitute in the values:
750 = a * b5
and
48 = a * b2
Then divide the two equations:
750/ 48 = (a * b5) / (a * b2)
So:
15.625 = b3
Take the cube root of both sides:
2.5 = b
Now, substitue b into one of the equations (the one with 48 has smaller numbers and is easier to work with.)
48 = a * 2.52
Simplify.
48 = a * 6.25
Divide both sides by 6.25
7.68 = a
Now substitute in a and b to write the exponential function:
y = 7.68 * 2.5x
D = P - 2.50
D is price after coupon is used, P is price before
