Algebra
posted by mysterychicken on .
Need to get these problems checked
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

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 
So 31 is B?
MC