Answer:
There is no change.
Step-by-step explanation:
Answer: 4
Step-by-step explanation:
x - 2y =10
x = 10 + 2y



... cancel like terms (y + 5)
= 4
A^2 + 16^2 = 20^2
(Third one)
Move the decimal five places until it is after one number, and because the number got bigger, your exponent is a negative.