9+-3 means 9 plus 3 less
basically it is 9-3=6
Answer:
7/8 = 14/16
Step-by-step explanation:
7/8 * 2/2 = 14/16
After the 15% discount, Maria pays 85% of the cost. That cost is the sum of the fixed cost and the variable (per visit) cost.
... (updated cost) = 0.85×($150 +$30×a)
... (updated cost) = 127.50 +25.50a . . . . in dollars