6x + 9y = -15 Cx + 3y = -5
What value of C would produce a system that has infinite number of solutions? Justify your answer
Please help me

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2