Can some one please help me?

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 adds to be the bottom number but also multiplies to be the top number with 8 on the bottom and 15 on top

Evaluate each expression. determine if the final simplified form of the expression is positive or negative -42 (-4)2 42