(x + 10)² - 1
= (x² + 20x + 100) - 1
= x² + 20x + 99
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Answer:
C
Step-by-step explanation:
Answer:
<h2>x = 140, y = 80</h2>
Step-by-step explanation:

Answer:
12×6×2+6×5×2+12×5×2= 324m^2
Answer:
x =68
Step-by-step explanation:
We know that x+22 = 90 because the sum of the two angles is a vertical angle to the right angle and vertical angles are equal.
x+22 =90
Subtract 22 from each side
x+22-22 = 90-22
x =68