Direct and Inverse Variation

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The weight of an object on Earth varies directly as the weight of the same object on the moon. A 300 pound object would weigh 48 pounds on the moon. How much would a 65 pound object weigh on the moon?

M= 52/5 or 10.4 pounds

The distance required to stop a car varies directly as the square of its speed. If 250 feet are required to stop a car traveling 60 miles per hour, how many feet are required to stop a car traveling 96 miles per hour?

d=640 feet

classify the following as inverse, direct, neither d= 4t

direct

classify the following as inverse, direct, neither m= -5p

direct

classify the following as inverse,direct, neither r= 9/t

inverse

what is the constant variation of d=4t

k=4

what is the constant variation of r=9/t

k=9

The volume v of gas varies inversely to the pressure p. The volume of a gas is 200 cm^3 under pressure of 32 kg/cm^2. what will be its volume under pressure of 40 kg/cm^2. What will be its volume under pressure of 40 kg/cm?

v=6400/p 160cm

y varies directly with x. If y=-4 when x=2, find y when x=-6

y=12

y varies inversely with x. If y=40 when x=16 find x when y=-5

y=640/x y= -128


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