Let f(x) = 11x + 2x² and g(x) = -7x - 3x² +4. Find (f +g)(x) and (f -g)(x). Then evaluate f + g and f -g for x = 2 .

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

Sum is 17 and their difference is 3