Suppose your diet is such that your daily saturated fat allowance shouldn't exceed 20g. If a Snickers bar has 5g of saturated fa
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To evaluate a function at a given input, you have to substitute every occurrence of the variable with that particular value.
So, for the first function, you have
The name of the variable is obviously irrelelvant, so the same goes for the second function:
It is answer choice A because you have to take the the GCF of each number which is 2x. Then if you were to divide the numbers by 2x you would put those numbers in the brackets.
because 
and 
and 