Determine the solutions to the system of equation.
y= x^2 – 2 and y= -x + 4

I'm so close to finishing all these.

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

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