Guys help please!! Just 1 Algebra 2 question?

Suppose that r varies directly with s and inversely with t, and r=2 when s=3 and t=12. What is the value of r when s=5 and t=4?

1 Answer

  • r = As/t

    We have to solve for A first.

    rt/s = A

    (12 x 2)/3 = 8

    Now we can relate the 3 by r = 8s/t

    r = (8 x 5)/4

    r = 10

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