Which is the recursive formula for the sequence whose explicit formula is a, = (n +
1)??
an = (An-1 +12 where a1 =1
On = An-1 +n where a1 = 1
an = (vn +Qn-1) where a, = 4
an = (van-1 + 1)? where a, = 4

Can someone me do math because i am having a breakdown rn because i don’t get it

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

Huong is organizing paperback and hardback books for her club's used book sale. the number of paperbacks is 12 less than three times the number of hardbacks. huong had 162 paperbacks. how many hardback books were there?