Answer:
3
Step-by-step explanation:
Answer:
- 8
Step-by-step explanation:
Given
x² - 64 = 0 ( add 64 to both sides )
x² = 64 ( take the square root of both sides )
x = ±
= ± 8
Solutions are x = 8 and x = - 8
Ángel and Jayden we’re at track practice.
The track is 2/5 kilometers around.
* Ángel ran 1 lap in 2 minutes.
* Jayden ran 3 laps in 5 minutes.
How far does Jayden run in one minute?
4 1/6 km
So you would do is take 3,500 and multiply it by 4% to get 140
as you already know, we start off by doing a quick switcheroo on the variables, and then we solve for y to get the inverse,
![\bf y=x^2+4\implies \stackrel{switcheroo}{x = y^2+4}\implies x-4=y^2\implies \pm\sqrt{x-4}=\stackrel{f^{-1}(x)}{y}](https://tex.z-dn.net/?f=%20%5Cbf%20y%3Dx%5E2%2B4%5Cimplies%20%5Cstackrel%7Bswitcheroo%7D%7Bx%20%3D%20y%5E2%2B4%7D%5Cimplies%20x-4%3Dy%5E2%5Cimplies%20%5Cpm%5Csqrt%7Bx-4%7D%3D%5Cstackrel%7Bf%5E%7B-1%7D%28x%29%7D%7By%7D%20)
and if you run a vertical line test on that expression, you'll find that it doesn't pass it, meaning is not a function.