Question

Best Rentals charges a daily fee plus a mileage fee for renting its cars. Barney was charged $123.00 for 3 days and 300 miles, while Mary was charged $216.00 for 5 days and 600 miles. What does Best Rental charge per day, for mileage? Can anyone help me solve this one...I need to build the equations and show the work

Answer 1

Let D be daily fee, M be mileage fee
Barney:
3D + 300M = 123
mary:
5D + 600M = 216
Its a system of 2 equations
solve using substitution or elimination

Answer 2

can you solve it from here?

Answer 3

8D+900M=339 is that right?

Answer 4

I got:
d= 30
m=.11 or 11cents per mile..

good job dumbcow

Answer 5

yes, however that doesn't eliminate any variable so it doesn't help

Answer 6

ok how do I solve?

Answer 7

yes thats what i get as well.


LCM of 3 and 5 is 15
Multiply top equation by -5
Multiply bottom equation by 3
-15D -1500M = -615
15D +1800M = 648
--------------------
0 + 300M = 33
M = 33/300 = 0.11

Answer 8

Then substitute that value for M back into 1 of the equations to solve for D.
3D +300(0.11) = 123
3D +33=123
3D = 123-33 = 90
D = 90/3 = 30