Answer:
What is that?
Step-by-step explanation:
Answer:
20 miles per gallon of gas
Step-by-step explanation:
You will need to divide 50 and 2.5
50/2.5 = 20
Let's check
20 * 2.5 = 50
So we got it right!
Answer:
Step-by-step explanation:
Essentially, begin by flipping the x and y terms:
x = (1 - 2y)^2 + 5
Then, solve for y:
![\ x = (1-2y)^2 + 5\\\sqrt{x-5} = 1 - 2y\\\sqrt{x-5} - 1 = 2y\\\frac{\sqrt{x-5} - 1}{2} = y^-1\\](https://tex.z-dn.net/?f=%5C%20x%20%3D%20%281-2y%29%5E2%20%2B%205%5C%5C%5Csqrt%7Bx-5%7D%20%3D%201%20-%202y%5C%5C%5Csqrt%7Bx-5%7D%20-%201%20%3D%202y%5C%5C%5Cfrac%7B%5Csqrt%7Bx-5%7D%20-%201%7D%7B2%7D%20%3D%20y%5E-1%5C%5C)
Because we know there is only 1 y-value for any given x-value, the inverse of the given function is also a function.
Without the actually predicted values in comparison to the real values it is only possible to give a very likely answer based on their scale:
a) is 25 million off, which sounds bad but when compared to a few billion in population it's not even 1%
b)3 billion is more than half the world population as error: very unlikely
c)154 billion, unlikely that a prediction is off by a factor of ~30
d)same as c
so a) is most likely the solution, but in theory the predictions could be arbitrarily bad (things like negative population, or extreme growths)