Why is it important to have categories of numbers and to know which categories you are dealing with in a given expression?

Which problem could be  solved  by evaluating the expression  7×(−3)7×-3?

Elijah and his sister went to the movies. they had $34 altogether and spent $9.50 per ticket. elijah and his sister bought the same snacks. write and solve an inequality fotlr the amount that each person spent on snacks. interpret the solition

What is the value of y? round to the nearest tenth