110% of what number is 880?

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.)

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122