Lớp 10a có 45 học sinh, trong đó có 18 học sinh giỏi môn văn, 22 học sinh giỏi môn toán và 12 học sinh không giỏi văn hoặc toán. Tính số học sinh giỏi cả 2 môn văn là toán a) 5

b) 11

c) 15

d) 7

Which of the following expressions is equal to 2x^2+8

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?