1. A rational number is a number that can be written as a fraction.
For example: 1/3, 5/7, 90/666, etc
Note: Any integer can be written as a fraction.
Look:
5 = 5/1 = rational
-14 = -14/1 = rational
2. There is no difference between a rational and integer.
I'm not positive I know the answer, but I have a feeling that because it's asking that you select all that apply, there is more than just one answer.
x + 3 = 0
-3 + 3 = 0
So yeah, just basically solve them as individual problems. Just do additive inverse for each expression.
Answer:
I'll do the first one and lets see if that helps
Step-by-step explanation:
Answer:
C: 12m
Step-by-step explanation:
We can solve this by using the Pythagorean Theorem 
For this triangle
a= x b= 5 c= 13
We now have the equation

If we simplify this we get

Next, we subtract 25 from both sides

Finally, if we take the square root of both sides of the equation, we find that
x= 12