Mike has coffee worth 4$ per pound that he wishes to mix with 20 pounds of coffee worth 7$ per pound to get a mixture that can be sold for 5$ per pound. how many pounds of the cheaper coffee should he use ?

One of the inventors of integrated circuits observed that the number of transistors that fit on an integrated circuit will double every 24 months. what type of relationship most appropriately models this situation?

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 33 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30 ∘c on monday, but decreased at a constant rate in the next 33 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?