Solve the systems of equations by elimination-Solo team teach

5a-2b = 0
2a-3b = -11

Find the equation using the point (4,8)

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?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class