THIS SEEMS CONFUSING, ANY IDEASokokokokokok

- anonymous

THIS SEEMS CONFUSING, ANY IDEASokokokokokok

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- chestercat

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- anonymous

i have an idea on how to solve but im not sure

- anonymous

yess.. their are multiple choices

- anonymous

what's your idea?

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## More answers

- anonymous

um............ i honestly have no clue. i need a head start please....

- anonymous

x is the number of students, so x = 9. They're asking for r(p(9)).

- anonymous

ok. sooo 9 = 4x − 3. 9+3=12 divide by 4 i get three. but its not one of the choices..... :/

- anonymous

r(p(9)) means plug 9 into the p(x) equation. Then plug that answer into the r(x) equation.
Start by finding p(9) by plugging in 9 for x in p(x).

- anonymous

r(x) is just the amount of money total, not for each student

- anonymous

im lose now..

- anonymous

lost

- anonymous

p(x) = 2x + 1
Substitute 9 for x
p(9) = 2(9) + 1

- anonymous

@nerlineg you're not solving for x. You're replacing it with a number

- anonymous

thats 19 @peachpi and that just gives you the amount of pizzas they need to order

- anonymous

9*2+1 = 18+1 = 19

- anonymous

2x +1 determines how many pizzas need to be purchased
they need to know how much money needs to be brought in so, wouldnt you put in 9 in the second function ?

- anonymous

p(9) = 19.
Now you need to find r(19) so put 19 into r(x)

- anonymous

@nerlineg does it grade it as soon as you put in the answer and hit submit?

- anonymous

no, it doesn't.

- anonymous

i did and i got 4

- anonymous

@peachpi i got 4

- anonymous

@nerlineg please show me how it looks when you change the x in r(x) to 19

- anonymous

how are you doing the math ? 4(19)=76-3=73

- anonymous

oh i plug it in, in the wrong one. but yes i got the same thing @dani_00 got...

- anonymous

just walking you through the steps @peachpi said

- anonymous

so... the answer 73 :)

- anonymous

yes 73

- anonymous

yep you got it

- anonymous

but this seem tricky. i had a hard time understanding it, but thanks to you two. :)

- anonymous

welcome

- anonymous

no problem

- anonymous

i have an idea to what to do next time seeing this :)

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