James used substituion to solve this system of equations. Which equation could be the result of his first step?
2x+3y=12
y=x+1.5

1. are the triangles similar and if so why? what is the value of x? show your work.

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?

Find the circumference of a pizza with a diameter of 10 inches round to the nearest tenth