I NEED HELP PLEASE IM STRUGGLING

Simplify.7x + 3y - 2 + 6x + 1 + y squared 2 you! ; )

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.

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle