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Solve the problem as directed. If x and y vary directly, and x = 10 when y = 3, what will be the value of x when y = 9?
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3 votes
Solve the problem as directed. If x and y vary directly, and x = 10 when y = 3, what will be the value of x when y = 9?

User Caglarozdag
by
5.4k points

2 Answers

3 votes
A simple ratio will probably work. 10=3
x=9?
Cross multiply. 3x= 90 This x=30
User Paladini
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6.6k points
5 votes
X will equal 30. If y equals 9, then that means it was multiplied 3 times, so you do the same with x. 10*3=30.
User Zakmck
by
6.1k points
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