Here are 10 test scores: 30, 74, 76, 77, 78, 79, 80, 80, 82, 84. the mean of these scores is 74.
does this set have an outlier and, if so, how does removing it affect the mean?

Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm

I’m still confused on how to work the percentages