4 out of the 80 students at a school assembly were first-grade students. What percentage of the students at the assembly were first-graders?

Quick use technology to approximate the solution(s) to the system of equations to the nearest tenth of a unit. {f(x) = x - 6 / -x² + 8 {g(x) = i x i (dont know how to add an image) select all that apply. (-3.3, 3.3) (3.3, -3.3) (3, -3) (3, 3) (-3, -3) (can select multiple)