Help please just this 1-5 please answer correctly but real people only answer correctly no links. I'll do anything Which is to stop texting you and give you a break please help

What are “like terms”? why can we only add like terms?

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

The ratio of wooden bats to metal bats in the baseball coach’s bag is 2 to 1. if there are 20 wooden bats, how many metal bats are in the bag?