An equilateral triangle is a triangle that has three sides of the same length. the perimeter of an equilateral triangle is 48.6 centimeters. use an equation to find the length of each side.

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.