When adding two positive integers, the answer is always

Average salary for a medical assistant is $31,220 which is a 20% income tax bracket how much money would they pay in income tax?

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?

Which expression is the factorization of x^2+10+21