What is the value of X

Pls me this is due today and i need i will make brainliest if you me answer correctly and i will report if you try to give me a dumb answer.

Find the average rate of change for the given function drom x=1 to x=2

The ratio of white marbles to blue marbles in connie's bag of marbles is equal to 2: 3 there are more than 20 marbles in the bag . what is a possible number of white marbles and blue marbles in the bag.