6x + 3y = -4
15x + 7y = -8
how many solutions does the system of equations have?

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.

Hello, i need compare km^2 and km. what's difference in this?