√(9a) + √(25a) - √(49a) với a ≥ 0

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?

The equation of line wx is y=2x-5. write an equation of a line perpendicular to line wx in slopeintercept form the contains points (-1,-2)

Mr. jones determined that the equation y = 98 - 16/5 x could be used to predict his students' unit test scores, based on the number of days, x, a student was absent during the unit. what was the meaning of the y-intercept of the function? (by the way the 16/5 is a )