Given:
hours parking charge
4 5.50
7 7.75
7 - 4 = 3 hours
7.75 - 5.50 = 2.25
2.25 / 3 = 0.75
0.75 is the change in amount for every hour spent. It is the variable unit rate
4 hours is 5.50.
Cost of parking for 3 hours is: 5.50 - 0.75 = 4.75
0.75 x 4 hours = 3
5.50 - 3 = 2.5 fixed charge.
total parking charge: y = 2.50 + 0.75x
-2x-46+1=5
the answer ends up being
x=-25
<span>3/4 - (-2/3)
= </span><span>3/4 + 2/3
=9/12 + 8/12
= 17/12.....as </span><span>improper fraction</span>
