If a rate of speed r is constant, then distance, rate, and time are related by the direct variation equation d = rt, where d represents distance and t represents time. if r = 30 miles per hour, which of the following best describes the graph of d = rt ?

Gail is making costumes for a school play. each rabbit costume needs one and one half yards of white fur fabric, a yard of blue striped fabric, and a quarter of a yard of pink felt for the ears. g? ail needs to make eight rabbit man yards will she need, for the white fur fabric, blue striped fabric, and pink felt?

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.

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?