System of equations with graphing y=-2x-5;y=2x-2

What is the value of y? round to the nearest tenth

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12