Solve the following 1-step equation for x

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.

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?