
Candace S. answered 02/28/16
Tutor
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A day without Math is like a day without sunshine!
Hi Danny,
When Q= 14\5, x= 4 and y= 3. Find Q if x= 8 and y= 3
Suppose that Q varies directly with x and inversely with y.
Suppose that Q varies directly with x and inversely with y.
The equation is: Q=kx/y
14/5=k(4)/3
multiply both sides by 3/4: 21/10=k (k is the constant of variation)
Find Q if x= 8 and y= 3:
Q=(21/10)(8/3)
= 28/5
ANSWER: Q=28/5 or 5.6 (in decimal form)