A function is given by the formula y= −1.5x + 7.5 . For what value(s) of x is: y>0

Question

A function is given by the formula y= −1.5x + 7.5 . For what value(s) of x is: y>0

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Khang Minh 3 years 2021-08-19T09:19:59+00:00 1 Answers 1 views 0

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  1. thaiduong
    0
    2021-08-19T09:21:34+00:00
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    Answer:

    x can be 4.99 to make y>0

    Step-by-step explanation:

    y= −1.5x + 7.5

    For what value(s) of x is: y>0

    lets solve for x first:

    -1.5x + 7.5 = 0

    -1.5x * 10 + 7.5 * 10 = 0 * 10

    -15x + 75 = 0

    -15x + 75 – 75 = 0 – 75

    -15x = -75

    x = -75/-15

    x = 5

    to make y>0, we substitute x<5 into the formula

    y > −1.5(4.99) + 7.5

    y > 0.15

    therefore, x can be 4.99 to make y>0

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