PLEASEEE HELP IVE BEEN STUCK ON THIS QUESTION FOR AGES

Fractions can be added and subtracted only if they're fractions. a. like b. proper c. improper d. unlike

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

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.