[50 POINTS!] Please help me and my friend here! :(

(NO RANDOM ANSWERS OR REPORTED!!)

The table shows the webster family’s monthly expenses for the first three months of the year. they are $2,687.44, $2,613.09, and $2,808.64. what is the average monthly expenditure for all expenses?

What is the range of the function? f(x)=-2|x+1|? a. all real numbers. b. all real numbers less than or equal to 0. c. all real numbers less than or equal to 1. d. all real numbers greater than or equal to 1

How to write four times a number,minus 6,is equal to theee times the number+8 as an equqtion