Justin is 29 years old, and Delaney is 19 years old. How many years ago was Justin's age 3 times Delaney's age?

What values of data might affect the statistical measures of spread and center

Students are given 3 minutes for each multiple-choice question and 5 minutes for each free-response question on a test. there are 15 questions on the test, and students are given 51 minutes to take it.how many multiple-choice questions are on the test?

The late fee for library books is $2.00 plus 15¢ each day for a book that is late. if maria’s fee for a late book was $3.20, write and solve a linear equation to find how many days late the book was.