10x^2y^-2 = 10 x (-1)^2 x (-2)^-2 = 10 x 1 x 1/4 = 10/4 = 2 1/2
Y - 3 = 2(x+5)
y - 3 = 2x + 10
-3 - 10 = 2x - y
-13 = 2x - y
D) 2x - y = -13
Answer:
Subtraction.
Step-by-step explanation:
You Subtract 6 on both sides first and then you multiply the denominator which is 11 to the other side of the equal sign.
Step-by-step explanation:
use the pythagoras theory.
a2 + b2 = c2
the firth one use this formula
a2 = c2 - b2
a2 = 10.6² - 5.6²
a2 = 112.36 - 31.36
a2 = 81
a = 9
The same method use to the eighth one
