Speed = Mileage/Time
13 days and 8 hours = 13x24 + 8 = 320 hours
Speed = 2400/320 = 7.5 miles/hour
Answer:
<em>2(x) + 2(x + 3) = 90 </em>
Step-by-step explanation:
Width: x inch.
Length: (x + 3) inch.
P = 2 + 2
P = <em>2(x) + 2(x + 3) = 90</em>
Divide by 10 both sides and you get a=4