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cestrela7 [59]
3 years ago
12

If y varies directly with x and y=30 when x=-10, find the value of x when y=4

Mathematics
1 answer:
mel-nik [20]3 years ago
4 0
If y∞x  then y=kx where k is constant to find k 
 k=y/x then   substitute the values
k=30/-10=-3 to find x when y is 4
x=y/k=4/-3=-4/3   option A
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