For this case we must solve the following inequality, finding the values for the variable "t":

We subtract 18 from both sides of the inequality:

Thus, the variable "t" is defined for all strict lower values than 25.
Answer:

Option A
Answer: Yes, 4-6 is the same as 4 + (-6).
Step-by-step explanation:
One reason why they are the same is because 4 - 6 equals -2 and 4 + (-6) also equals -2. You can turn 4 - 6 into 4 + (-6) by turning the subtraction sign to a plus sign and turn the positive 6 into a negative 6.
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