Combine like terms
20b + 10a - 10b + 3a

Compare the cost of the bike trips from the two companies shown.for both the cost in a linear function of the number of days which statements is true

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?

State if the two triangles are congruent. if they are, state how you know?