9. The following series is arithmetics 8+13+18+*+138
(6) Determine the number of terms in this series. Show how you arrived at your answer.
(1) Determine the sum of this series. A numerical answer alone will earn at most one point.

Simplify the expression. -2/5(10+15m-20n)

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2

Joe has some money in his bank account he deposits 45$ write an expression that represents the amount of money in joe's account