Need to get these problems checked--

Question

31. Determine whether the sequence 7, 21, 35, 49 is geometric. If so, find its common ratio.
a. no
b. yes, common ratio of 14
c. yes, common ratio of 12

I'm stuck between A and B..

32. What are the next three terms of the geometric sequence 5, 15, 45,...?

135, 405, 1215? Not sure about this...

33. What is the area of a square with the dimension of 1 + sqrt of 2?

9.64?

35. Simplify: 2 sqrt of 4 + 2 sqrt of 8

4+ 5.65?

Thanks
-MC

Answer 1

31. How are you stuck? There is how much between each number? Take two consecutive numbers and subtract them.\
32. Correct
33. Not sure
35. 2sqrt4+2sqrt8=4+4sqrt2

Answer 2

So 31 is B?

-MC