X=10-2y
x=5y-1
10-2y=5y-1
10=7y-1
11=7y
11/7=y
x=5(11/7)-1
x=55/7-1
x=48/7
B. Five cubed because there at 5 2s there and 2*2*2*2*2 would be the same thing as saying 5^2
Answer:
The answer is -2 and 2.
Step-by-step explanation:
You have to solve the modulus :
Let r = usual driving rate
let t = usual driving time
We need to figure out t
The distance she covers in her usual time at her usual rate is r*t
The distance she covers in her new time at her new rate is:
(1+t)*((2/3)r)
Set this equal to each other and solve for t.
rt = (2/3)r + (2/3)rt
(1/3)rt = (2/3)r
(1/3)t = (2/3)
t = 2
So her usual time is 2 hours. (There's probably a faster way to do this)
If each cube is (1/3) inch on each side, then the volume of each cube is
(1/3) * (1/3) * (1/3) = (1 / 27) of a cubic inch
3,996 of those (1 / 27) inch cubes =
3,996 * (1 / 27) = 148 cubic inches