The sum of three numbers is 9.the first number minus the second plus the third is 3. the first minus the third is 1 more than the second. find the number

This is so hard and it’s for a test

Two friends are reading books. jimmy reads a book with 21,356 words. his friend bob reads a book with one-and-a-half times as many words. which expression represents the number of words bob reads?

Drag the tiles to the correct boxes to complete the pairs. using the properties of integer exponents, match each expression with the correct equivalent expression.