Simplify.
(6 - i) + (5 – 8i)
[? ] + [ ]i

The circumference of a circle is 5 pi cm. what is the area of the circle?

On saturday morning, calls arrive at ticketmaster at a rate of 108 calls per hour. what is the probability of fewer than three calls in a randomly chosen minute?

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?