Part a)
The inequality that represents the number of folders f and notebooks n she can purchase is 
Part b)
The graph is attached in figure.
Step-by-step explanation:
Part a)
Total budget of Mary = $150
Price of each folder = $2.15
Price of each notebook= $4.60
Let f represent folder and n represent notebooks the inequality will be:

We are using less than or equal to (≤) because the budget is 150. the total price should be less than or equal to 150.
So, inequality that represents the number of folders f and notebooks n she can purchase is 
Part b)
Graph the inequality 2x – 3y = 12
We need to graph the inequality but in the given question the inequality sign is missing.
Considering less than equal to (≤) sign
2x – 3y <= 12
The graph is attached in figure below.
Keywords: Solving inequalities
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Answer:
$231.42
Step-by-step explanation:
Find the tub radius. It is C = 2πr, which here is C = 6.28(5.5 ft ) = 34.54 ft.
The border costs $6.70/ft. Multiply $6.70/ft by 34.54 ft:
($6.70/ft)(34.54 ft) = $231.42
Answer:
D. 40
Step-by-step explanation:
12/30 = 16/x
or 12/16 = 30/x
A. .x -x=0
x+ -x=0
0=0
all real numbers are solutions
b. x-y+(-x)=x-y+(-x)
-y=-y
0=0
x=0/0 0 over 0