What is the solution to this system of equations? 3.2x+0.5y=4.2 -1.6x-0.5=3.4 ? a. (4.75, 38.8) b. (4.75, -22) c. no solution d. infinitely many solutions

What is the area of triangle abc if a = 8, b = 11, and c = 15?

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).

X² + 4y² = 36 the major axis runs along: a) y=4x b) x-axis c) y-axis