Answer:
Basic fee = $14.95
1.5 dollars per quart of oil
Step-by-step explanation:
Each customer is charged a fee x (in dollars) for the oil change, plus y dollars per quart of oil used.
The oil change for the car that requires 5 quart of oil costs $22.45.


The oil change for the car that requires 7 quarts of oil costs $25.45.


Both equation having x
so make it equal and solve for y

Add 7y on both sides

subtract 22.45 from both sides

now plug in 1.5 for y and solve for x

Answer:
9
Step-by-step explanation:
if 54=1 then do 54÷6=9
Step-by-step explanation:
The height of the rocket y in feet is related to the time after launch, x in seconds, by the given equation i.e.
......(1)
It is required to find the maximum height reached by the rocket. For maximum height put
.
So,

Put x = 5.15 in equation (1).

So, the maximum height reached by the rocket is 503.39 m.