Speed = distance / time
so ur speed = (3/5) / (3/8) = 3/5 * 8/3 = 8/5 or 1 3/5 miles per hr.
its the first answer choice
The constant of proportionality is 5
For the first bar day: 1 cell phone sold: 5 (unit rate:5)
second bar day: 2 cell phones sold: 10 (unit rate:5)
third bar Day: 3 cell phones sold: 15 (unit rate: 5)
fourth bar day: 4 cell phones sold: 20 (unit rate 5)
Basically you divide the cell phones sold by the day or 
Hope this helped <3
Answer: A. 7x(2x + 5)
Step-by-step explanation:
7x * 2x = 14x^2
7x * 5 = 35x
Abraham Lincoln, i've read that story a long time ago myself and I remember who said that.