Answer:
a. - 45 feet
b. - 18 feet.
Step-by-step explanation:
If we consider the water level as the reference level then the elevation of the fish is - 27 feet, i.e. the fish is 27 feet below the water level.
a. Now, the fish decreases its elevation by 32 feet and then increases its elevation by 14 feet.
Therefore, the new elevation of the fish is (- 27 - 32 + 14) = - 45 feet.
b. Now, if my elevation is of the new elevation of the fish then my elevation will be =
feet. (Answer)
Answer:
64
Step-by-step explanation:
So here you're just completing the square. the equation you gave is simply: where c is the unknown value we're solving for. Whenever you complete the square, you add (b/2)^2
The reason for this, is because whenever you write a binomial as a perfect square it's in the form: and this binomial expands out to become:
If we write the second term of the binomial as b/2 we get:
which simplifies to:
and as you can see the last term is (b/2)^2, which is why we need to add that part for it to be a perfect square.
So we would need to add (16/2)^2 = 8^2 = 64
This way, we can express it as a perfect square binomial: which expands out to: