A. The sum of two numbers is 22 and their difference is 14. i. Form the simultaneous equations.

ii. Find the two numbers.

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

Jorge wants to determine the enlarged dimensions of a digital photo to be used as wallpaper on his computer screen. the original photo was 800 pixels wide by 600 pixels high. the new photo will be 1,260 pixels wide. what will the new height be?

Sawsan recorded the favorite sport of students at her school. she surveyed 200 students. how many students chose tennis?