Given the function y = x2 + 2x - 8, what are the values of x when y = 3?

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Yvaries directly as x. y =90 when x=6. find y when x=13