Which property would allow you to use mental computation to simplify the problem 23 + (7 + 9) ?

associative property of addition

distributive property

additive identity

additive inverse

Maggie used the commutative property to write 4/5+6.9y-8 as the equivalent expression 6.9y+8-4/5. Did Maggie apply the commutative property correctly? Why or why not?

The sum of two consecutive odd integers is - 40. Find the two integers.

Andrew spent $69.70 to fill up his gas tank. Each gallon of gas costs $4.10. He then drove 442 miles until his gas tank was empty. How far did the car travel, on average, on a single gallon of gas?

lexia is making orange juice the recipe says it takes 4 parts water and 2 parts orange concentrate. lexia put 16 cups of water into a pitcher how much orange concentrate does she need to mix into the pitcher?

Why is it important to be able to solve for variables in equations?

Bob has 54 more five-dollar bills than ten-dollar bills. The number of five-dollar bills he has is 7 times that of ten-dollar bills. How many dollars does Bob have in all?

Note: Enter your answer and show all your steps that you use to solve this problem. Annika borrowed a book from the library and forgot to return it on time. The library charges $0.25 per day for the first four days and $0.

Alejandro would like to start a new business. His friends have suggested he go into merchandising. But he's confused about what exactly merchandising is. Which sentence provides Alejandro with the most accurate description of merchandising? A.

How do i explain 7-3 counting back

Find three consecutive integers with the sum of 267