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kati45 [8]
3 years ago
10

Alice buys some inexpensive bracelets and necklaces as party favors for her jewelry showing. She pays $8 for each necklace (N) a

nd $7 for each bracelet (B). She spends less than $120. Which inequality models this situation?
A) 7B + 8N ≤ 120
B) 7B + 8N > 120
C) 7B + 8N ≥ 120
D) 7B + 8N < 120
Mathematics
2 answers:
Lady_Fox [76]3 years ago
8 0

Answer:

D) 7B + 8N < 120

Step-by-step explanation:

Given,

The cost of each necklace = $ 8,

So, the cost of N necklace = 8N dollars

Also, the cost of each bracelet = $ 7,

So, the cost of B bracelet = 7B dollars,

Thus, the total spending = 7B + 8N,

According to the question,

Total spending is less than $ 120,

⇒ 7B + 8N < 120

Hence, OPTION D is correct.

Jlenok [28]3 years ago
4 0

Answer:

7B+8N<120

Step-by-step explanation:

The total amount of the bracelets and necklaces is less than $120, so if you add the price of each necklace ($8) and the price of each bracelet ($7), it will be <$120.

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The chemistry class was making 300 gallons of 30% isopropyl alcohol. They mixed 12% with 42%. How much of each did they use?
alexgriva [62]

Answer:

<u>The chemistry class mixed 120 gallons of 12% isopropyl alcohol and 180 gallons of 42% isopropyl alcohol.</u>

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Amount of isopropyl alcohol made by the chemistry class = 300 of 30%

Amount of 12% isopropyl alcohol mixed by the chemistry class = x

Amount of 42% isopropyl alcohol mixed by the chemistry class = 300 - x

2. How much of each did they use?

Let's write our equation to solve for x, this way:

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