jason used 1/2 of a bag of bird seeds for 2/5 square yards of his farm land. how many bags does he need per square yard

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

Two angles are complementary. the large angle is 36 more than the smaller angle. what is the measure of the large angle?

What is the distance from zero if a quadratic function has a line of symmetry at x=-3 and a zero at 4