Let the speed of Brian = X
Brian drove at X miles per hour for 4 hours
Jake drove at X-15 for 4 hours
Set up an equation to get:
4x + 4(x-15) = 500 miles
Simplify:
4x + 4x -60 = 500
8x - 60 = 500
Add 60 to both sides:
8x = 560
Divide both sides by 8:
X = 560/8
X = 70
Brian's speed was x = 70 miles per hour.
Jake's speed was x - 15 = 70-15 = 55 miles per hour.
<span>Add up the finance charge and new purchases to the old balance. Then subtract off the payment to lower the balance
277.45+3.22+299.33-316.00 = 264
The new balance is $264.</span>
According to formula
P(1 - R/100)^ T
P =PRICE
R =RATE OF DEPRECIATION
T= TIME
answer is $47320
