LuluMathLover101
14.11.2019 •
Mathematics
Suppose y varies directly with x. if x is -7 when y is 3, what is x when y is -5?
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Ответ:
-7/3 = x/-5-7 to 3 = x to -5
cross multiply
(3)(x) = (-7)(-5)
3x = 35
x = 35/3
x = 11 2/3
check..
-7/3 = (35/3) / -5
cross multiply
3(35/3) = (-5)(-7)
35 = 35 (correct)
so when y = -5, x = 35/3 or 11 2/3
Ответ: