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Nadusha1986 [10]
3 years ago
8

Let y=21 and x=1.5 if y varies directly with x find y when x=9

Mathematics
2 answers:
Svetllana [295]3 years ago
8 0
Y would be 42. if you multiple 1.5 by 3 it will be 9. so if divide 21 by 1.5 it equals 14 so multiple 14 by 3 it gives you 42
AnnZ [28]3 years ago
7 0
If y varies directly with x then we have the following function:
y=x + (21 - 1.5) or simply y = x + 19.5.
So, when x=9:
y = 9 + 19.5 = 28.5

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