What is sample mean of 6,7,1,9,2,4,5,5,3,3,7,8

Write the sentence as an equation. 6 fewer than the quantity 140 times j equals 104

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?

15 liters is approximately how many gallons