To expand, you just take the 5 and multiple by each individual factor.
10 x 5x + 5y x 10
Mile, Inch, Foot. We Americans do not use the metric system.
Answer:
C. 
D. 
Step-by-step explanation:
C. 
D. 
Two consecutive integers would be x and x+ 1
if you multiply them you have x(x + 1) = x^2 + x
if you want the product to equal 90 you get x^2 + x = 90
The first option is correct.
U can see the answer in the picture below
