Chelsea and a group of her friends picked 25 apples on Monday. By Friday, they had eaten 80% of them. How many apples had they eaten by Friday?

How can we find the measure of an exterior angle if we know the measurement of an interior angle

Eis the midpoint of line segment ac and bd also line segment ed is congruent to ec prove that line segment ae is congruent to line segment be

What is the value of the discriminant of the quadratic equation -2x = -8x + 8 and what does its value mean about thenumber of real number solutions the equation has?