algebra2 my multiple choice answers.r they right?

Question

3+√x+2=1

a.62
b.64
c{}
is this answer c.

√x+5=9

a.2
b.4
c.16
4?

do this have roots.?
2√5x-4 -3=-11

Answer 1

c no solution
c 16
supposing it is 2*sqrt(5x-4)-3 = -11
sqrt(5x-4) =-7/2
which can´t be as the left side is positive