Could somebody help and explain pls thank you

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

Write the expression 7x^3-28xy^2 as the product of 3 factors

To diagonalize an nxn matrix a means to find an invertible matrix p and a diagonal matrix d such that a pdp d p ap or [1 3 dh epap 3 let a=-3 -5 -3 3 3 1 step 1: find the eigenvalues of matrix a "2's" step 2: find the corresponding eigenvectors of a step 3: createp from eigenvectors in step 2 step 4 create d with matching eigenvalues.