Is the point (20, 24) on line L

If the discriminant if a quadratic equation is 4 which statement describes the roots?

(05.02)a farmer has decided to divide his land area in half in order to plant soy and corn. calculate the area of the entire area so he knows how much soil is needed. a parallelogram with a height of 6 yards and side length 9 yards. the height forms a triangle with the slanted side of the rhombus with a base of 2.5 yards. rhombus is split into a soy half and a corn half. each bag of soil covers 40 square yards. how many bags should the farmer purchase?

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)