Answer: 
Required theorem:
Pythagorean theorem = 
In other words, one side length squared + another side length squared = the middle lined squared.
Step-by-step explanation:

We can only have a positive distance so your final answer is :

Recall the relation:
8 oz =1 cup
so,
1 oz = 18cup
Therefore,
16 oz = 168cup
= 2 cups
Hence, she should measure 2 cups to get 16 oz.
Answer:
They switched the w and the -15 at the end
Step-by-step explanation:
When you switch the inequality sign after multiplying or dividing a number, the variable stays on the side its on, even if it looks weird.