Mark the Correct alternative in the following:

Given that x, y and b are real numbers and x < y, b > 0, then

Mark the Correct alternative in the following:

If x < 7, then

Mark the Correct alternative in the following:

If −3x + 17 < −13, then

Mark the Correct alternative in the following:

If x is a real number and , then

Mark the Correct alternative in the following:

If x and a are real numbers such that a > 0 and , then