Math help pretty please?

Question

11: 3 sqrt 5+4 sqrt 5/14

12: sqrt 363b^3c

13: 9 sqrt 4-6 sqrt 24+ sqrt 36

14: 3 sqrt 5 times sqrt 5+3 sqrt 5 times 2 sqrt 75

15: sqrt 50/49

Answer 1

$5 bucks and ill tell

Answer 2

PROBLEM 11:

3 sqrt 5+4 sqrt 5/14

= 3√5 + 4√5/14

= 3√5 + √40/7

= 3√5 + 2√10/7 = Final Answer

PROBLEM 12:

sqrt 363b^3c

= √363b^3c

= 11√3b^3c = Final Answer

PROBLEM 13:

9 sqrt 4-6 sqrt 24+ sqrt 36

= 9√4 - 6√24 + √36

= 9*2 - 6*2√6 + 6

= 18 - 12√6 + 6

= 24 - 12√6 = Final Answer

PROBLEM 14:

3 sqrt 5 times sqrt 5+3 sqrt 5 times 2 sqrt 75

= (3√5)(√5 + 3√5)(2√75)

= (3√5)(4√5)(2*5√3)

= (3√5)(4√5)(10√3)

= (12*5)(10√3)

= 60(10√3)

= 600√3 = Final Answer

PROBLEM 15:

sqrt 50/49

= √50/49

= 5√2/49

= 5/7√2 = Final Answer