Complete the statements below with the process used to achieve steps 1-4. Step 1: -3 to 4x and -7. Step 2: Step 3: 21. Step 4: -10. V 2x

Pls , the question is in the picture!

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10