Johnny has 90, 84, and an 86 on his first 3 tests. what score would he need to make on the 4th test to bring his test average up to a 90

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

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.

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