1. is the third choice
2. is second choice
3. is fourth choice
Answer:
7000
Step-by-step explanation:
Answer:
Yes, Sierra is correct
Step-by-step explanation:
Given

Required
Is she correct
The right parenthesis has 4 + 5.
This can be simplified as: 
So, we have:


The left parenthesis has y + 7.
This cannot be simplified because y is a variable and 7 is a number.
<em>Hence, Sierra is correct.</em>
18 is 6+n. The other one is 60 because n=60 and 60+6=66. 66 represents Chang's height.
Answer:
30 x 30 x 26 = 23,400 area= 23,400
Step-by-step explanation: hope it helps