B. 0
Explanation: at sea level is 0, below sea level would be a negative such as -2, and above sea level is any number above zero, such as 2.
The answer is 4x^2 +5x+9
You will first solve the same variables such as x^2
11x^2 - 7x^2 = 4x^2
now you will solve the variables with x
-3x +8x = 5x
so the answer you will get will be 4x^2 +5x = 9
Well if the room is going to be cubed and the length of one side is 23 whenever you want to find the volume of a cube all you do is take one side and square it.
so we have 23² which equals 529
the volume would be 529 cubic feet
hope this helps
Answer:
x = 30
y - 120
Step-by-step explanation:
(vertical angles)
(supplementary angles)
