Solve the system of equations algebraically

Which function is odd check all that apply a. y=sin x b. y=csc x c. y=cot x d. y=sec x

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.

Need so much on this one how many yards?