Big Jim's Pencil Shop can manufacture 240 pencils in 10 minutes. At this rate, how many pencils can Big Jim's Pencil Shop produce in 30 minutes?

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$