A school needs to purchase desks and chairs. Each desk costs 12 dollars and it's 8 dollars for each chair. Write an algebraic
expression to find the total cost if the school buys x desks and
y chairs. Write your answer in the form ax + by" where a
and b are positive or negative constants.

1. the following set of data represents the number of waiting times in minutes from a random sample of 30 customers waiting for service at a department store. 4 5 7 10 11 11 12 12 13 15 15 17 17 17 17 17 18 20 20 21 22 22 23 24 25 27 27 31 31 32 a. determine the number of classes and class interval.

What is the unit rate of, 75% high fiber chimp food to 25% high protein chimp food.

Billie holiday sells children's clothing for sara vaughn's toddler shop. baby blankets sell for $29.99 after a markup rate based on cost of 109%. find the cost and the markup.