Can someone check my answers? 1. simplify the sum or difference. sqrt 5 + 6 sqrt 5 a) 6 sqrt 5 b) 30 c) 6 sqrt 10 d) 7 sqrt 5 2. simplify the sum or difference. 4 sqrt 2 - 7 sqrt 2 a) negative sqrt 6 b) -3 sqrt 2 c) -11 sqrt 2 d) 11 sqrt 2 3. simplify the sum or difference. 3 sqrt 7 - sqrt 63 a) -2 sqrt 7 b) -6 sqrt 7 c) -4 sqrt 3 d) 0 4. simplify the sum or difference. -6 sqrt 10 + 5 sqrt 90 a) 9 sqrt 10 b) -9 sqrt 10 c) -39 sqrt 10 d) -10 5. simplify the product. sqrt 6 (sqrt 2 + sqrt 3) a) sqrt 8 + 3 b) sqrt 30 c) 2 sqrt 3 + 3 sqrt 2 d) 4 sqrt 2 + 3