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>
This is a direct variation, since the cost and the number of articles purchases both go up.
Answer:
4 is the absolute value of -4
Step-by-step explanation:
absolute value is basically how many units from 0 the number is.
Answer:
≈ 0.8333333333333
Step-by-step explanation:
Since anything divided by 6 is a repeating decimal, we know it will go on forever.