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Katyanochek1 [597]
3 years ago
11

Can someone check my answers?

Mathematics
2 answers:
Ghella [55]3 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]3 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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