Answer:
6
Step-by-step explanation:
15 - 3 = 12, divide that by 2 and your answer is 6.
Answer: 27
Explanation:
P = 2(l+w) = 2 · (9 + 4.5) = 27
By scientific notation I am assuming you mean standard form, as that is used primarily in scientific calculations. The answer in standard form would be

I hope this helps!
Answer:
Angles RSQ and WVX are alternate interior angles.
Hope this helps!
Answer:
it's 13 meters taller
Step-by-step explanation:
both meters are not the same which means it can't be another number