Question

Jarod's Car Rentals charges a flat rate of $22.50 per day plus $2.50 per mile. If the number of miles is represented by "m", which algebraic expression represents the overall rate for the day using "m"?

25m

22.5m + 2.50

20m

22.50 + 2.50m

Answer 1

Alright, hi again.

so what is the variable in this equation? the flat rate, or the miles you travel?

Answer 2

im not sure..

Answer 3

alright, well flat rate means you are going to pay it no matter what you travel. So 22.50 is not going to have a variable.

then there is the 2.50 per mile charge, which depends on how many miles you travel. so it will contain the variable.

Knowing that, which answer would you say is correct?

Answer 4

B?

Answer 5

B gives the variable to the 22.50. that's not what you're going for.

Answer 6

d?

Answer 7

Yes! :)
think of it like this:

flat rate + cost per mile * however many miles you travel

then translate it into numbers.
we know that "however many miles you travel" is the variable. Make that "m."
The flat rate, we know, is 22.50.
and the cost per mile is 2.50, right?

so,
22.50 + 2.50 * m

Yes indeed, D is your answer. :)