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leonid [27]
3 years ago
13

Joanna joins a CD club. She pays $7 per month plus $10 for each CD that she orders. Write an inequality to find how many CDs she

can purchase in a month if she spends no more than $100. Identify what your variable represents.
Mathematics
1 answer:
Effectus [21]3 years ago
6 0
Lets use x as the number of CD's that she will buy in a month. So knowing that, our inequality can look like this. 7 + 10x < or = 100. Why? because we will have to multiply 10 with the number of CDs she will purchase in a month to get the total she spends. Hence 10 times x. She also has to add a 7 membership fee per month to this. Also, she has to remember that what she paid has to be less or equal to 100 because the problem states that she spends no more than 100 a month. 
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Answer:

Step-by-step explanation:

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3 years ago
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IRINA_888 [86]

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ASHA 777 [7]
You have the right idea and you are close to the correct answer. However that's not what your teacher is looking for in terms of steps.

The starting inequality is b + 8 \ge 20
She starts off selling 8 buckets. Then she sells b more to get a total of b+8
This total must be 20 or larger which is why I set b+8 greater than or equal to 20

Solve for b by subtracting 8 from both sides

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If you graphed this on a number line, then you would draw a closed circle at 12. Then shade to the right of the close circle. 
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3 years ago
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