How many ways can 4 people sit in a row of 7 chairs?

Use the graph to determine the range. which notations accurately represent the range? check all that apply. (–∞, 2) u (2, ∞) (–∞, –2) u (–2, ∞) {y|y ∈ r, y ≠ –2} {y|y ∈ r, y ≠ 2} y < 2 or y > 2 y < –2 or y > –2

What are the soultion(s) to the quadratic equation 40- x^2=0

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10