Answer:
Number of min
Step-by-step explanation:
Hi,
Since the number of min determines our total cost, it's the independent variable.
Hope this helps :)
18in
1/2 = 0.5
3/4 = 0.75
x=1.5
or
x=1 1/2
4x-7>-1
add 7 to both sides
4x=6
divide by 4 on both sides
