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shutvik [7]
3 years ago
14

Fill in the other coordinate for the line 7x - 5y = 21: (4, )

Mathematics
1 answer:
garri49 [273]3 years ago
8 0
7x - 5y = 21....(4,?)...so sub in 4 for x and solve for y
7(4) - 5y = 21
28 - 5y = 21
-5y = 21 - 28
-5y = - 7
y = 7/5

check..
7(4) - 5(7/5) = 21
28 - 35/5 = 21
28 - 7 = 21
21 = 21 (correct)

the other coordinate is 7/5......(4,7/5)
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3 years ago
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Step-by-step explanation:

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Therefore concrete are required to make lower step = (6×3×1.5) cubic feet

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and concrete are required to make upper step = (6×6×3) cubic feet

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