Hi please answer this its okay without solution

What is the 15th term oft he sequence 5-4n

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?

With number 11 ( show how you got the answer)

Aright triangle has an area of 21 m2. the dimensions of the triangle are increased by a scale factor of 4. what is the area of the new triangle