Find the coordinates of the midpoint of AB by finding the averages of the coordinates 1. A(4,3) B(8,8)
2. A(7,2) B(1,5)
3. A(-5,6) B(1,-3)
4. A(-7,-1) B(-5,-9)

Ineed to learn how to solve this problem

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

20 da is equal to a. 2,000 cm. b. 2 m. c. 20,000 cm. d. 20,000 mm