Solve each quadratic equation. show your work. x^2 + 3x = 10

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Which of the following is the true for f(x) = 5cos

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?