80% of the students in Lea’s class earned an A or a B on the weekly math test. If 20 students got an A or a B, how many students
are in Lea’s class? Will give Brainliest!!
P.S. This is 6th Grade math on Edge 2020
Here are the options:
0 20 is 80% of what number?
0 20 × 4 = 80, so 100 × 4 = 400 students
0 20 + 60 = 80, so 100 + 60 = 160 students
0 80 ÷ 4 = 20, so 100 ÷ 4 = 25 students
0 80 – 60 = 20, so 100 – 60 = 40 students
Factor the following: 15 x y - 45 x - 6 y + 18 Factor 3 out of 15 x y - 45 x - 6 y + 18: 3 (5 x y - 15 x - 2 y + 6) Factor terms by grouping. 5 x y - 15 x - 2 y + 6 = (5 x y - 2 y) + (6 - 15 x) = y (5 x - 2) - 3 (5 x - 2): 3 y (5 x - 2) - 3 (5 x - 2) Factor 5 x - 2 from y (5 x - 2) - 3 (5 x - 2): Answer: 3 (5 x - 2) (y - 3)
