Two math questions
1.
consider the following pair of equations:
y = x + 4
y = –2x – 2
explain how you will solve the pair of equations by substitution. show all the steps and write the solution in (x, y) form. (5 points)
2. attached

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?

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?

The formula for the volume of a right square pyramid is given below, where a is the side length of the base and h is the height.