Question

Number 13 is what I need done

Answer 1

Instead of using an = sign we use $\leq$ becuase its less than or equal to 100 dollars.

The equation of the line is y=10x+7

sub in 100 for y and the inequallity sign

10x+7$\leq$100

solve so x is isolated

10x$\leq$93
x$\leq$9.3

technically the answer is 9 because you cant buy a fraction of a CD