There are 15 girls and three boys in a dance class. If a leader is chosen at random, what is the probability a boy is chosen?

Which sentence describes why polygon mnop is congruent to polygon jklp? a. polygon jklp maps to polygon mnop through a translation. b. polygon jklp maps to polygon mnop through a rotation. c. polygon jklp maps to polygon mnop through a dilation. d. polygon jklp maps to polygon mnop through a stretch.

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²