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Katen [24]
3 years ago
13

What is the answer or how do you set up this problem

Mathematics
1 answer:
Zanzabum3 years ago
5 0
I hope this helps you





3x-50+7x=180



10x=230


x=23
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Are the these expressions equivalent 6a + 12 and 3(3a + 4)
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Answer:

No

Step-by-step explanation:

6a + 12  =? 3(3a + 4)

Distribute

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No

The expressions are not equivalent

5 0
3 years ago
Read 2 more answers
In a shipment of airplane parts, 5% are known to be defective. If 21 parts are found to be defective, how many parts are in the
horrorfan [7]

We can use ratios and the cross-multiply-divide to find this.



The ratio 21:5 is avaliable via the question. We then need to compare that to the ratio x:100, the 100 being the percent and the x being the number of airplane parts.



21/5 = x/100



We can then solve for x to find the number of airplane parts. First we multiply by 100 on both sides to get 2100/5 = x. Therefore x = 420 and there are 420 airplane parts.

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3 years ago
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Step-by-step explanation:

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3 years ago
A student's grade depends on her score on four equally-weighted exams. Her average on the first three exams is 92. What must she
Sergeeva-Olga [200]
3x92 = 276 (first 3 exams)
average of at least 90 (90 x 4 = 360)

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Answer
<span>she needs to score at least 84 on the fourth exam </span><span>in order to guarantee a final average of at least 90</span>
4 0
3 years ago
What is the area surface?
Rus_ich [418]

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Step-by-step explanation:

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