A common multiple is a number that is a multiple of two or more numbers. The common multiples of 3 and 4 are 0, 12, 24, .... The least common multiple (LCM) of two numbers is the smallest number (not zero) that is amultiple of both.
Answer:
4. 
5. 
6.
or 3.5
Step-by-step explanation:

Multiply those 2 values whose diagonal has both terms and divide by the term whose diagonal has the variable.

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X(x+3)-7(x+3)
x2+3x-7x-21
x^2-4x-21
Theres no graphs but this is how the function looks like
I would say the answer is A and E