If (x + y) + (2(x + y) + 3) = 9, what is x + y?? A. 3-1
B. -3 + 1
c. -3-1
D 3 + 1
E. 9-31

Find parametric equations for the line tangent to the curve of intersection of the surfaces at the given point. surfaces: xsquared2plus+2yplus+2zequals=1212 yequals=33 point: left parenthesis 1 comma 3 comma five halves right parenthesis

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).

Solve for x: 5/3 x = 20/21 it's fraction. remember to simplify your fraction