Assume that when adults with smartphones are randomly selected, 49% use them in meetings or classes. if 9 adult smartphone users are randomly selected, find the probability that at least 4 of them use their smartphones in meetings or classes.

Create a real-life situation and create a system and show how it might be modeled algebraically with a system of equations (or inequalities) show all work include a few sentences explaining the situation, your variables of choice and what each represents, and how you would set it up and solve it algebraically. !

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Solve with work adding cheese to a mcdonalds quarter pounder increases the fat content from 21g to 30g. what is the percent of change ?