Solve the system of equations -x+2y=-9−x+2y=−9 and -5x+8y=-27−5x+8y=−27 by combining the equations.

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

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

Ireally need subtract and simplify.(-y^2 – 4y - 8) – (-4y^2 – 6y + 3)show your work, ! i will mark you brainliest but you have to show your work.