Let the marks of the students in class 1 be
the average of these 12 marks is 90, so
which means
similarly, let
be the marks of the students in the second class,
so
which means
The 32 students averaged:
Answer: The fourth choice
Step-by-step explanation:
(f - g)(x) = f(x) - g(x) = 4 - 5x - (3 + 6x - 4) = - 11x + 4
Answer:
Step-by-step explanation:
Answer:
3
Step-by-step explanation:
18 factors to 2, 3, 3
45 factors down to 5,3,3