The temperature in degrees Fahrenheit F is related to the temperature in degrees Celsius see by the equation F=9/5c+32. In parts of Alaska the temperature can reach -60°F how many degrees Celsius is this? Pls help by tonight!! I give Brainiests!

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.

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?

How do i take any fraction and make it into a decimal or percentage?