The number of diphtheria cases fell from 175,000 cases before the vaccine to one case after the vaccine was developed. What percent change does this represent?

Find the vertex of the function given below y=x^2-6x+1

Use the function f(x) is graphed below. the graph of the function to find, f(6). -2 -1 1 2

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.