A CD usually sells for $15. If the CD is 30% off, what is the new price of the CD?

$11.5

Step-by-step explanation:

?/15 = 30/100. Now you can simplify the second fraction to- 3/10. Now cross multiply 15 x 3 = 45 now do 45/10 you're answer is $4.5. Don't forget to subtract that from 15. 15 - 4.5 = $11.5.

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation: