A large square is dissected into rectangles and squares if the area of 3 regions are 64,24 and 24 what is the area of the small one

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?

Which system of linear inequalities is represented by the graph?

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota