What is the mean for the set of data shown below

The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side then from the larger side of the rectangle. the perimeter of the rectangle is equal to 56 cm. find the lengths of the sides of the rectangle. 16 points answer quick

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?