Can someone please help me with these math questions I'm stumped?

Question

1. Simplify the expression

55

__

35

2.

Simplify the following expression:

B^2 +5b+6

__________

3bc

_______

b^2-9

______

6bc

3. Solve this proportion for the variable:

3/y=12/8

4. Simplify

q^-2 – r^-2/q^-1 –r^-1

5. Express this sentence as a formula: z varies directly with the square of s

Thank you, any help would be much appreciated!

Answer 1

1. 11/7

3. 3/2=12/8

y=2

divide by 4