Answer:
The correct answer is
b. If x is divisible by 2, then x is an even number.
Step-by-step explanation:
a. It can be true, because even it is 2 can divide odd numbers but it has a decimal numbers, so it depends on the question.
b. It is true, because the number 2 is a prime number and it can divide all even numbers.
c. It can't be true, because square has only 4 equal sides and angles, it should be a pentagon if it needs a 5 sides and angles.
d. It can't be true, if we only talk about rational numbers and not rational expressions, because rational numbers has only denominator equal to 1, so it can't be undefined. A rational expressions that has denominator equal to 0 is undefined.
