If y varies directly as x, and y is 18 when x is 5, which expression can be used to find the value of y when x is 11? y (11)

Question

If y varies directly as x, and y is 18 when x is 5, which expression can be used to find the value of y when x is 11?

y (11)

y (11)

y- (1939

11

y11/(18)(5)

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Josephine 2 weeks 2021-11-13T22:54:45+00:00 1 Answer 0 views 0

Answers ( )

    0
    2021-11-13T22:56:07+00:00

    Answer: The value of y is 39.6 when x = 11 and the required expression is y(11) = 39.6

    Step-by-step explanation:

    Since we have given that

    y varies directly as x.

    If y = 18, when x = 5.

    So, we need to find the value of y when x is 11.

    According to question, we get that

    \dfrac{y}{x}=\dfrac{18}{5}=\dfrac{y}{11}\\\\18\times 11=5y\\\\198=5y\\\\\dfrac{198}{5}=y\\\\y=39.6

    Hence, the value of y is 39.6 when x = 11 and the required expression is y(11) = 39.6

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