Mary baked four loaves of bread, each weighing w ounces. They weighed 80 ounces in total. does this use addition, subtraction, multiplication, or division? i have a chart and it says that the term “total” is used when adding, but i wrote it using multiplication?

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.

What is the area of a rectangle with vertices (-8,-2), (-3,-2), (-3,-6), and (-8,-6)? units

Which of the following is best modeled using a linear equation y=ax+b, where a is less than 0?