Answer:
a. more samples need to be compared
c. the samples are not similar
Answer: undefined in both cases.Explanation:1) Expression to evaluate:

2) You are asked to evaluate that expression for two different cases,
x = 0 and x = 3.3) First case:
x = 0The expression cannot be evaluated at x = 0, because the
denominators (both denominators)
equal 0, and the division by 0 is not defined.
So, the answer is
undefined.
4) Second case,
x = 3When you replace x = 3 you get:

Again, this result in a
division by 0, so you conclude that it is
undefined too.
Al chile no se wey, buscale en otro lado
When multiplying out you get:
x2+4x-3x-12....
so you'd be adding the +4x to the -3x
x2 + x - 12
600km??? Because it’s travelling 600km and hour so it’s average is 600km and hour