Please answer question #2 and please show work

Find parametric equations for the line tangent to the curve of intersection of the surfaces at the given point. surfaces: xsquared2plus+2yplus+2zequals=1212 yequals=33 point: left parenthesis 1 comma 3 comma five halves right parenthesis

Find the solution of this system of equation -7x+y=-20 9x-3y=36

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