Tyler has 3 times as many books as Mai.

How many books does Mai have if Tyler has: 21 books

Use the matrix-column representation of the product to write each column of ab as a linear combination of the columns of a.

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

If you had $1,900,000, how many days would it take you to spend all if you spent $1 a second. (there are 86,400 seconds in a day)