Graph the linear equation 7x+4y=-28

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

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

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?