Virgil has 1/6 of a birthday cake. he wants to share the leftover cake with 3 freinds. what fraction of the original cake will each of the 4 people receive?

What is the size of the matrix resulting from

Two blends of tea are mixed to make a blend that will be sold at the fair. black tea sells for $2.20 per pound and orange pekoe tea sells for $3.00 per pound. how much of each should be used to obtain a 4lb blend selling for $2.50 per pound?

According to statistics a person will devote 32 years to sleeping and watching tv. the number of years sleeping will exceed the number of years watching tv by 18. over a lifetime, how many years will the person spend on each of these activities