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kow [346]
4 years ago
10

The sum of 21 and a number is 30

Mathematics
1 answer:
vagabundo [1.1K]4 years ago
5 0
The answer is 9, because you subtract 21 from 30 and you get 9. When you add 21+9 you get 30.
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Solve this<br><br> 2(4x -3) + 2 = 8
Sladkaya [172]

Answer:

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6 0
3 years ago
Write the number 0.000938 in scientific notion.
ss7ja [257]
<span>0.000938 in scientific notion.

First we need to move the decimal to its right and we need a number which is between 1-10. 

0.000938
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000.0938
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We moved the decimal 4 times and to the right so it will be negative. -4.


9.38 </span>× 10^-4

Scientific notation of 0.000938 is 9.38 × 10^-4.

Check:-

9.38 × 10^-4 = <span>0.000938
</span>0.000938 = <span>0.000938
</span>Correct!

<span>Scientific notation of 0.000938 is 9.38 × 10^-4.</span>
6 0
3 years ago
Confusedddddddddddddddd
Elina [12.6K]
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1. 4x + 4
92

2. 88
4 0
3 years ago
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