RU is 34. To find the answer you can use a proportion. In this problem the proportion would be 60/51 = 40/x. You can then cross multiply giving you 51*40=60x. You can then solve for x which is your answer.
•Using the formula the first term is a1 = −3 •Using the formula the second term is a2 = −1 •Using the formula the third term is a1 = 6 •Common difference formula: a2 - a1 = (-1) - (-3) = 2
