How many squares would have to be shaded so that of the shape is shaded

When a rectangle is dilated, how do the perimeter and area of the rectangle change?

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?