HDTV screens usually have a width-to-height ratio of 16:9. Which screen dimensions are in the same proportion?
26 inches by 19 inches
4 feet by 3 feet
48 centimeters by 27 centimeters
28 inches by 21 inches

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

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.

With finding limits of multi variable !