A factory produces video tapes at a cost of 88cents and sells them for $ 1. 10 . Find the percentage increase ?

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /

Shannon drove for 540 minutes. if she traveled 65 miles per hour,how many total miles did she travel?