Answer:
x-1
Step-by-step explanation:
Answer:
9m
Step-by-step explanation:
The surface area of a cube is given by
SA = 6s^2 where s is the side length
We know the surface area is 486 and the side length is z
486 = 6z^2
Divide each side by 6
486/6 = 6z^2/6
81 = z^2
Take the square root of each side
sqrt(81) = sqrt(z^2)
9 = z
Each side has a length of 9m
You can solve with the formula for cuadratic equations:
x=−b±√b2−4ac
2a
Answer:
36 years
Step-by-step explanation:
Maria interest rates was to get 2% annual. Her interest rate do not change of 72. So you will have to divide 72 out of 2 which that will give you 36 . 36 years is your answer.
It's is C. 4/5 I don't know that math