Write an equation of the line that passes through the points (4,7) and is parallel to and perpendicular to the line y=1/2x-1 answer

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

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.

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?