How do I use FOIL? I get lost every time...especially with exponents

Anne is twice as old as bill, and bill is 3 years older than christie. the sum of anne s and christie s ages equal 72. find their age difference.?

Amerchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. how many pounds of the & 60 coffee should be used?

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits