Write an algebraic expression for the word phrase: 9 less than one half a number

How do you find the area of this triangle.

Abag of jelly beans contain 13 pink, green, 20 yellow, 10 black, 7 red, and 11 orange jelly beans. approximately what percent of the jelly beans are pink and yellow?

Find the solution(s) to x^2-14+49=0