Question

John wants to rent movies over his school vacation. The cost for the movie rental is $4.50 per movie. John starts out with $20. Write an equation for the amount of money, y, John will have after x amount of movie rentals.
Answer

y = 20 - 4.50x

y = 4.50x - 20

y = 20 + 4.50x

y = 4.50x

Answer 1

@MiaKitty @UnkleRhaukus Help

Answer 2

This is just like the question I helped you with earlier, but you have to combine them together, what do you think?

Answer 3

Either B or C

Answer 4

\[y=mx+b\]

where \(m\) is the rate of change

and \(b\) is the initial value

Answer 5

Well, it isn't B, because you don't subtract values in this equation, so?

Answer 6

I have a question for you, ramiro:

Let's say you buy two movies. How much money will you be left with?

Answer 7

Ummm probably 0

Answer 8

or at least 3 bucks or something

Answer 9

Hmm... tell me this: how much would two movies cost?

Answer 10

I have to go now! Anyone who can help Ramirocool can. :)

Answer 11

@UnkleRhaukus I got A

Answer 12

note

\(mx+b=b+mx\)

Answer 13

@UnkleRhaukus D.

Answer 14

@UnkleRhaukus : I think at Ramiro's age, formulas like that are more confusing that actually using real life examples.

Granted, I'm under the impression that Ramiro doesn't care either way, so it probably doesn't matter.

Answer 15

if one movie costs $4.50
two movies costs 2×$4.50=

Answer 16

8.50

Answer 17

@UnkleRhaukus

Answer 18

Close. But do it on paper to be safe.

Answer 19

@uber1337h4xx0r /yup B

Answer 20

\[2\times4.50=2\times4+2\times0.50=8+1=\]

Answer 21

@UnkleRhaukus Sorry for the long wait C.

Answer 22

Right?