Mr. Walker asked his students to use the associative property to find an expression that is equivalent to (13+15+20) + (20+47+18). The expressions that four students created are shown in the table below.
Student
Jeremy
Layla
Expressions Generated by Students
Expression
(20+13+15)+(20+47+18)
(20+47+18)+(13+15+20)
(13+ 20)+(20+47+18)+ 15
(13+15+20+20) + (47+18)
Keith
Melinda
How many of the students correctly applied only the associative property to rewrite the expression?
one
two
three
four

Which of the following is a proper fraction? a. 9⁄8 b. 5⁄6 c. 7⁄3 d. 4⁄2

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?

Amovie streaming service charges it’s customers $15 a month. martina has $98 saved up. will she have any money left over if she pays for the maximum amount of months she can afford? explain.