X varies directly as y, and x = 153 when y = 9. Find x when y = 13.

asked Jan 20, 2018 78.4k views

3 votes

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6 votes

y = kx
9 = 153k
k = 9/153
k = 3/51

so if y = 13 then
13 = 3/51 x
x = 13 (51/3)
x = 221

answer
x = 221 when y = 13.

SCBuergel answered Jan 23, 2018

8.5k points

7 votes

153/9 = x/13

153 x 13 = 1989

1989/9=221

x = 221

Shuguang answered Jan 24, 2018

8.1k points

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