Need some help with some questions:

1) What is the simplified form of:

2) Which fraction is equal to:

A.

B.

C.

D.

3) How many solutions are there for x if

4) Which equation has no simultaneous solution with:

A.

B.

C.

D.

5) Which one of these expressions is not rational?

A.

B.

C.

D.

Question 1) 7 root 2

Question 2 ) c

Question 3) ?

Question 4) A

Question ) D

the answer to the expression is 83

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents