Answer:
b 120 cm
Step-by-step explanation:
You see what the average is in each class. (Divid students and classes) and add them together and divid by four. You should get 18 if you round to the whole number.
Answer:

Step-by-step explanation:
When subtracting polynomials, first start with distributing the negative sign to the second polynomial:

Simplify by combining like terms:

Answer:
45
Step-by-step explanation:
(replace m with 7 and replace n with 3)
6 x 7 = 42 then you add 3 = 45