How many liters of a solvent that costs s80 per liter must be mixed with 6 l of a solvent that costs s25 per liter to make a solvent that costs s36 per liter?

Sum is 17 and their difference is 3

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Isuck at math ; ^; m a student solved this problem and said the answer is 3 feet. chase had a roll of ribbon that contained 7 7/8  feet of ribbon. he cut off one piece that was 3 5/8  feet long and another piece that was 1 1/4  feet from the roll. how much ribbon was left on the roll? is the student's answer reasonable? yes, the answer is reasonable. no, the answer is not reasonable. it should be about 2 feet. no, the answer is not reasonable. it should be about 13 feet. no, the answer is not reasonable. it should be about 4 feet.