Holly is displaying a postcard collection on a bulletin board that is 20 4/5 in long. If each postcard is 2 1/5 in long how many post cards can holly display?

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Ineed with number 6 , explain how to get 1978