In a physics examination, the mean mark of the first twelve students in a class is 60,that of the next twenty students is 50 and the remaining y students is x. what is the mean mark for the whole class in the examination in terms of x and y​

f(x) = y

f(-3) = -5

step-by-step explanation:

c

c

c

c

c

c

c

cc

c

step-by-step explanation:

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exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.