6. At the school bake sale, Kenji's mom bought 3 cookies, 1 brownie, and 1 cupcake. She gave the cashier $2 and
received $1.05 in change. Find the cost of a cupcake
and write it in the table.

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)