1 over 2 sqr 32 times sqr 2 simplify the expression

Answer 1

I don't know if this is right or not but, you can multiply the sqr roots together to get �ã64 = 8

1/16 is the answer I got

Answer 2

sqrt2/[2 sqrt(2*16)]

Cancel the sqrt2's and replace sqrt 16 by 4, and you get
1/(2*4) = 1/8

Answer 3

2x-y=1
y=-3