Answer:
d. 16 feet
Step-by-step explanation:
x² + 12² = 20²
x² + 144 = 400
x² + 144 - 144 = 400 - 144
x² = 256
√x² = √256
x = 16
The answer is 2+2=5.
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Distribute : 1/2x + 3 = 18
subtract the 3 from both sides: 1/2x= 15
divide: x= 30