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?

Mathematics

2 answers:

Schach [20]2 years ago

8 0

A simple ratio will probably work. 10=3
x=9?
Cross multiply. 3x= 90 This x=30

Vladimir [108]2 years ago

6 0

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.

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