An = A1 + (N-1)d A1 is the first term (in this case 2) d is the common difference (what is the difference between all consecutive even numbers? 2) N is the number of terms to find (in this case 29) An = 2 + (29-1)2 = 58 I would say none of the above, unless you typed it wrong. The sum is the product of the number of terms minus one and two, plus two more. So it's almost answer B but not really. Good luck with this one.
A: The student incorrectly divided both sides by 35. The student should first add 10 to both sides, obtaining 35x = 15, and then divide 15 by 35, obtaining the final answer 3/7.
