Let a and b be any real numbers. A. Simplify the product of (a + bi)(a – bi).

B. Using your answer from part A, justify what kind of answer always results from multiplying a complex number and its complex conjugate.

What is the difference between the equations of a vertical and a horizontal line?

Awater truck is filling a swimming pool. the equation that represents this relationship is y=19.75x where y is the number of gallons of water in the pool and x is the number of minutes the truck has been filling the pool.

What does the pair of equations y = 1, z = 8 represent? in other words, describe the set of points (x, y, z) such that y = 1 and z = 8?