Find all solutions to the equation.
cos^2x + 2 cos x + 1 = 0

Write a real-world solution that can be represented by the equation y = 7x be sure to explain what the variables represented in the solution

Average salary for a medical assistant is $31,220 which is a 20% income tax bracket how much money would they pay in income tax?

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.