Solve the system by substitution
-x-y-z=-8
-4x+4y+5z=7
2x+2z=4

3. find the radius of circle p.4. find y.

Me with this one question, and i'll upvote the brainliest answer

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?