Y=2x-1
2x+y=3
how do i solve this substitution problem

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2

Place the following steps in order to complete the square and solve the quadratic equation,

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?