Question

The function d(x) = 3x + 2 determines how many donuts need to be purchased for a meeting, where x is the number of people at the meeting. The office manager uses h(d(x)) to find the amount of money to bring for the donut purchase. The function h(x) = 2x + 7. Solve for how much money to bring when there are 8 people in the meeting.

25
26
52
59

Answer 1

for d(x)=3x+2 i got x=2

Answer 2

Do i plug 2 into h(x)? or am i way off?

Answer 3

NVM, I'm way off somewhere, somehow.

Answer 4

This problem involves "composite functions." the function h(x) becomes the INPUT of the function d(x).

Start with function h(x)=2x-7.
Throw out both instances of variable x.
In the empty spaces left, write d(x) (in other words, d(x) replaces x in h(x).

Answer 5

26?

Answer 6

But d(x) = 3x + 2, right?

So throw out "d(x)" and fill the empty spaces with 3x+2.

Please show me all steps you take.

Answer 7

Answer being 59?

Answer 8

I very much prefer to not respond to "right?" questions, but rather ask you to share what y ou've done. Please stop testing answers on me; instead, please show how you got your result.

Answer 9

I'm sorry, Im pretty sure this is correct. I followed your steps and wrote it all on paper. :) Thanks

Answer 10

Write out h(x) = 2x + 7.
Now throw out both "x"

h( ) = 2 ( ) + 7

please fill in the blanks appropriately.