The perimeter of a triangle is 7a-11b. if two of its sides are 2a+b and a-9b, what is the third side?

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

Two rectangular prisms have the same volume. the area of the base of the blue prism is 418 4 1 8 square units. the area of the base of the red prism is one-half that of the blue prism. which statement is true?