WILL GIVE A MEDAL

Question

WILL GIVE A MEDAL

anonymous · Answer

The cost of a parking permit consists of a one-time administration fee plus a monthly fee. A permit purchased for 12 months costs $660. A permit purchased for 15 months costs $810.

What is the administration fee?

anonymous · Answer

$50
$54
$55
$60

anonymous · Answer

@StudyGurl14

studygurl14 · Answer

If A = administration fee, and M = number of months, and C = total cost, F = monthly free

$\large T=A+FM$

12 months, $660
660 = A + F(12)

15 months, 810
810 = A + F(15)

Now you have a system of equations. Solve for A.

A + 12F = 660
A + 15F = 810

anonymous · Answer

dont i just add everything together 
honestly i forgot how to do that @StudyGurl14

studygurl14 · Answer

No, you can either eliminate the F variable and solve for A, which would take multiplying some big numbers. Or you can eliminate the A variable, solve for F, then plug in and solve for A.

studygurl14 · Answer

Do you want me to show you the latter?