Find the length of the segment given the points (-9, 2) and (5, -4)

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

If you answer right ill give brainliest, : )

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.