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antiseptic1488 [7]
3 years ago
11

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

Mathematics
1 answer:
Jet001 [13]3 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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The diagonal of the base is 4√5 centimeters.

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Step-by-step explanation:

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3 years ago
21/33 Marks
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Step-by-step explanation:

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8 0
3 years ago
Solve for r.<br> 7(r + 1) = 20.3
docker41 [41]

Answer:

r = 1.9

Step-by-step explanation:

7r + 7 = 20.3

<u>     - 7      - 7  </u>

7r = 13.3

divide by 7

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4 0
3 years ago
Read 2 more answers
What is equivalent to 4.321 × 10−4 ?<br><br> What is equivalent to 4.321 × 10−4 ?
Arlecino [84]

Please write that as 4.321 × 10^(−4).  The " ^ " indicates exponentiation and the parentheses help make clear that your exponent here is a negative one.

Rewrite 4.321 × 10^(−4) by moving the decimal point 4 places to the left:

0.0004321

7 0
3 years ago
Scott received $88.50 from a customer whose meal bill was $75. What percent tip did Scott receive? A. 12% B. 15% C. 18% D. 20%
Neporo4naja [7]
1st find out how much the tip was:
88.50 - 75.00 = 13.50

Now find the percentage 13.5 is of 75
13.5/75 x 100 = 18% (C)
4 0
3 years ago
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