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bonufazy [111]
3 years ago
15

Robert needs four shelves from a broad that is 2.5 meter long. The second shelf 18 centimeters longer than twice the length of t

he first shelf. The third shelf is 12 centimeters shorter than first shelf. The remaining shelf is 4 centimeters long than the first shelf. If Robert must use the entire 2.5 meter board for shelves, what is the length of the second shelf, in centimeters
Mathematics
1 answer:
Anastaziya [24]3 years ago
5 0
A; b; c; d = first; second; third; fourth shelfa + b + c + d = 250 cmb = 2a + 18c = a - 12d = a + 4in terms of a, plug all equations into originala + (2a + 18) + (a - 12) + (a +4) = 2505a + 10 = 2505a = 240a = 48b = 2(48) + 18b = 96 + 18b = 114 cm/1.14 m
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