Is the relation a function?

Joe has a rectangular chicken coop. the length of the coop is 4 feet less than twice the width. the area of the chicken coop is 510 square feet. what is the length of the chicken coup?

Which line is parallel to 5x = y – 12? a -7x + 2y = -4 + 3x b -9 + 4y = 5x + 3 c -3x + 5 = 4x + y d −15x + 12 = y

You are holding a fundraiser for cancer research. a certain charity organization has agreed to contribute \$10$10 more than the amount of money you raise to cancer research. in the equation below, ff is the amount of money that you raise during your fundraiser, and cc is the amount of money that the charity organization donates.