Answer:
Step-by-step explanation:
The answer is: " 12 months " .
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Explanation:
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(129 − 45) / 7 = 84 / 7 = 12 mos.
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Answer:
1). x = 81
2). x = 84
Step-by-step explanation:
1). By applying geometric mean theorem in the given triangle,

56x = (18√14)²
56x = 4536
x = 
x = 81
2). By applying geometric mean theorem,

16x = (8√21)²
16x = 1344
x = 
x = 84