If y=5, and x=42, what is the answer to 5y+10x?

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

The graph of a function f(x)=(x+2)(x-4). which describes all of the values for which the graph is negative and increasing? all real values of x where x< -2 all real values of x where -2