Atrain travels 186 miles in 3 hours. at this rate how many hours will it take the train to go 868 miles

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

Which is f(5) for the function –2x2 + 2x - 3?

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?