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Katyanochek1 [597]
4 years ago
11

Can someone check my answers?

Mathematics
2 answers:
Ghella [55]4 years ago
6 0

Answer:

1. D

2. B

3. D

4. A

5. C

6. A

7. D

8. B

9. B

10. C

Ilia_Sergeevich [38]4 years ago
4 0
1. sqrt5 + 6sqrt5 = (1+6)sqrt5 = 7sqrt5 (answer is D) 
2. 4sqrt2 - 7sqrt2 = (4-7)sqrt5 = -3sqrt2 (answer is B)
 3. 3sqrt7 - sqrt63 = 3sqrt7 - sqrt7 * sqrt9 = 3sqrt7 - 3sqrt7 = 0 (answer is D)
 4. -6sqrt10 + 5sqrt90 = -6sqrt10 + 5*(sqrt10 * sqrt9) = -6sqrt10 + 5*(3sqrt10)
= -6sqrt10 + 15sqrt10 = 9sqrt10 (answer is A)
 5. sqrt6*(sqrt 2 + sqrt 3) = sqrt12 + sqrt18 = 2sqrt3 + 3sqrt2 (answer is D)
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Explain how to find the estimated sum of <br><br><br> 5<br> 8<br> +<br> 2<br> 9<br> .
mina [271]

The estimated sum of the numbers fifty-eight (58) and twenty-nine (29) is equal to ninety (90).

<h3>What is the difference between a regular sum and an estimated sum?</h3>

In an estimated sum, the numbers are rounded; on the other hand, in a regular sum, the numbers are not changed.

<h3>What is the estimated sum of 58 and 29?</h3>

1. Round the numbers:

  • 58 = 60 as this number is nearest to 60 than to 58.
  • 29= 30 because of the same reason explained above.

2. Add the rounded numbers:

  • 60 + 30 = 90

Learn more about estimated sum in: brainly.com/question/660898

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bija089 [108]
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