Answer:
50
Step-by-step explanation:
5x+9 = 10x-9
Take 5x from both sides
9 = 5x-9
Add 9 to both sides
18 = 5x
Divide by 5
3.6=x
Answer:
3/2 mph
Step-by-step explanation:
= 
cross-multiply: 8r = 12
r = 12/8 or 1.5 mph
The length of the rectangle is 0.25 or 1/4. This is because the area is equal to 5/8 or 0.625, and the width of the rectangle is 2 1/2 or 0.25. So 0.625/2.5 = 0.25 or 1/4.