A point on a disk revolves around the center of the disk at a consistent rate of 5/6 revolution every 7/10 second. Which is the best approximation of the speed of the point in revolutions per second?

$4

step-by-step explanation:

$30×5=$150

$150 minus $130=$20

$20÷5=$4.

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i believe that the answer is

b. y-1=-2(x-4)

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