Which number is greater: 87 or 13.688? how do you know?

Mrs. gehrke said cheddar weighs 16.8 pounds. he actually weighs 15.2 pounds. what is the percent error?

Aweekly newspaper charges $72 for each inch in length and one column width. what is the cost of an ad that runs 2 column inches long and 2 columns wide? its not 288

Solve the system of equations using the linear combination method. {4x−3y=127x−3y=3 enter your answers in the boxes.