Joe want to know the average height of all the seventh grade male student at his school. there are 350 male seventh graders at his school. how can he find the average height without adding up the height of all 350 student.

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Which expression is equal to (21)(7)(3x) using the associative property? (21 · 7 · 3)x (7)(21)(3x) 32(7 + 3x) (3x)(7)(21)

Which equation is y = -6x2 + 3x + 2 rewritten in vertex form?