1. 8^2+15^2=c^2 Answer: c=17 2. 5^2+b^2=13^2 Answer: b=12 3. 9^2+13^2=c^2 Answer: c~15.81 Simplify. Assume that all variables are nonnegative. { this means square root 4. {12 Answer: 2{3 5. 2{75 Answer: 10{3 6. -3{72 Answer: -18{2 7. {200 Answer: 10{2 8. {3x^2 Answer: 3x 9. {3{18 Answer: 3{6 10. {5{10 Answer: 5{2 11. {15{6 Answer: 3{10 12. {3{27 Answer: 9 13. {18{14x Answer: 6{7x 14. {12{18 Answer: 6{6 15. {2/{5 Answer: {10/5 16. {75/{15 Answer: {5 17. 2/{2 Answer: {2 18. {9/{100 Answer: 3/10 19. -{49/{100 Answer: -7/10 20. {27/{75 Answer 3/5 If I get any of these wrong, can someone please show me how to them correctly ?

good job, I agree with all of them

1,2,3,4,5,6,7 are ok. 8. sqrt (3x^2) = x*sqrt(3) Check that. 9,10,11 ok. 12. sqrt(3)*sqrt(27) = sqrt 3*sqrt(3*9) 9*sqrt(9) = 9*3= 27. Check that. check 15. I think you just wrote it wrong. I get 1/5*sqrt(10). Check that. The others look ok.

I goofed on 12. It's ok.

Thank you both!

I agree with DrBob I should have checked them a bit less superficially.

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