Simplify the following expression.
-11x^2+10x-9x^2+6

Someone answer this check out the image!

In the diagram of circle o, what is the measure of zabc?

Damon makes 20 cups of lemonade by mixing lemon juice and water. the ratio of lemon juice to water is shown in the tape diagram. lemon juice\text{lemon juice} lemon juice water\text{water} water how much lemon juice did damon use in the lemonade? cups