Ask Question
8 November, 16:42

If x varies directly with y and x=6 when y=8, find x when y=18.

Options:

13.5

12

24

12.5

+2
Answers (1)
  1. 8 November, 19:50
    0
    x = 13.5

    Step-by-step explanation:

    direct variation

    y = kx

    substitute x and y to find k

    8 = k*6

    divide by 6

    8/6 = k

    4/3 = k

    y = 4/3 x

    now put in y = 18

    18 = 4/3 x

    multiply by 3/4

    18 * 3/4 = 3/4 * 4/3 x

    54/4 = x

    change to a decimal

    13.5 = x
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “If x varies directly with y and x=6 when y=8, find x when y=18. Options: 13.5 12 24 12.5 ...” in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers