Find the sum of -1 1/3 + 3/4

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?

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi