An airplane starts at rest and accelerates down the runway for 20 s. At the end of the runway, its velocity is 80 m/s north. What is the acceleration?

By dividing you can find the answer

If one were to put the y value into the equation, they could find out what x is for a certain value of y.  putting in the value of y (1), we get the equation: 1=4x-12=4xx=0.5this means that the value of x when why is 1 is x=0.5

Answer (d) the universe had cooled enough for atoms to combine, protons and neutrons were too far apart to form nuclei;