Ariana is shopping for toilet paper, and she prefers to get the best unit price she can. At the store, brand A is priced at $49 for 7 rolls of toilet paper and brand B is priced at $72 for 9 rolls of toilet paper.

The best unit price is Brand A.

Step-by-step explanation:

We can find the cost for each roll of toilet paper. For Brand A, we can do 49/7, which we get 7. That means that every roll of toilet paper cost $7 for Brand A. For Brand B, we do 72/9 and get 8. That means every roll of toilet paper cost $8 for Brand B. Since Brand A is cheaper per roll, Ariana should buy from that brand.

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set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x