Find x so the distance between (x, 2) and (2, 4) is the square root of 13. how do you work this?

Acable car begins its trip by moving up a hill. as it moves up, it gains elevation at a constant rate of 50 feet/minute until it reaches the peak at 2,000 feet. then, as the car moves down to the hill’s base, its elevation drops at the same rate.

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog