Caitlin has a $10 gift certificate to the music store. She has chosen a number of CDs from the $7
bargain bin. If the cost of the CDs is $32 after the gift
certificate is credited, how many CDs did Caitlin buy

9514 1404 393

  6

Step-by-step explanation:

Before application of the $10 credit, Caitlin's purchase was $32 +10 = $42. Your knowledge of multiplication facts tells you that 42 = 6×7. If each CD was $7, Caitlin bought 6 of them.

If you need an equation, you could use ...

  7x -10 = 32 . . . . the final value of Caitlin's purchase

  7x = 42 . . . . . . . .add 10

  x = 42/7 = 6 . . . . Caitlin bought 6 CDs.

the correct answer is b. negative exponential growth.

step-by-step explanation:

you can tell it's an exponential function because it decreases rapidly then levels out and never touches the x-axis.

it is negative because the y-axis decreases as the x-axis increases.

therefore it is a negative exponential growth graph.

hope i !