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

X varies directly as y, and x = 153 when y = 9. Find x when y = 13.
asked 78.4k views
3 votes
X varies directly as y, and x = 153 when y = 9. Find x when y = 13.

asked
User Arun Panneerselvam
by
8.0k points

2 Answers

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.
answered
User SCBuergel
by
8.5k points
7 votes

153/9 = x/13

153 x 13 = 1989

1989/9=221

x = 221

answered
User Shuguang
by
8.1k points
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