Answer:
240
Step-by-step explanation:
12 x 8 x 2.5 = 240
Yes, 3, 12, 13 is a right triangle
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a
Step-by-satep explanation:
x = 2y - 7
x + y = 47
substitute x
2y - 7 + y = 47
3y = 54
y = 18
x = 2x18 - 7
x = 29