Which is the least expensive unit rate:
3 for $1.26
4 for $1.68
5 for $2.25

So 3 for $1.26 and 4 for $1.68

Step-by-step explanation:

3 for $1.26 means $0.42 per each

4 for $1.68 means $0.42 per each

5 for $2.25 means $0.45 per each

So 3 for $1.26 and 4 for $1.68 would be the least expensive unit rate!

Hope this help :3

518,400

step-by-step explanation:

the area is multiplying all the given measurements together.

40 * 18 * 30 * 24 = 518,400

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign