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antiseptic1488 [7]
2 years ago
11

7. Seven times a number is equal to 12 more than 3 times the number.

Mathematics
1 answer:
Jet001 [13]2 years ago
4 0

Answer:

7n = 12+ 3n

Step-by-step explanation:

The first thing to do is subtract 3n from 7n. This would get you 4n = 12. 4 times 3 equals 12, so n equals 3.

To check your answer. 21 = 12+9. sure enough it matches our answer

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miskamm [114]
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Answer

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3 years ago
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For the 1,000-meter running event, Abby's mean time is 4.5 minutes with a standard deviation of 0.75 minutes. For the 800-meter
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Answer:

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Obtain the standardized score for each event :

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