Need asap what are the restrictions of: (n^2 -6) / (n^2 -2) 5 and 2 +/- sqrt5 and +/- sqrt2 5 and -2

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?

Aramp rises 4 feet over a distance of 10 feet. what is the length of the ramp?