![f(x) = -8\cdot 4^x](https://tex.z-dn.net/?f=%20f%28x%29%20%3D%20-8%5Ccdot%204%5Ex%20)
You reflect a function with respect to the
axis by changing its sign.
In fact, if you consider the two alternatives
and ![x \mapsto -f(x)](https://tex.z-dn.net/?f=%20x%20%5Cmapsto%20-f%28x%29%20)
you can see that you're choosing opposite outputs for the same inputs.
In other words, one graph will be made of points like
, the other of points like ![(x,-f(x))](https://tex.z-dn.net/?f=%20%28x%2C-f%28x%29%29%20)
And the transformation
![(x,y) \to (x,-y)](https://tex.z-dn.net/?f=%20%28x%2Cy%29%20%5Cto%20%28x%2C-y%29%20)
is exactly a reflection with respect to the
axis.
Since the area of the walkway is not given, it's substitution in the answer is x. You do have the measurements of the pool though. Area=length times width. 36 times 18 is 648. The area of the concrete is x-648 ft, because the pool is not apart of the concrete. The area of the walkway can be expressed by X-648 ft.
Answer:
exact form: 5/2
decimal form: 2.5
mixed number form: 2 2/1
Step-by-step explanation:
Answer: x=-1 and y= -3
Step-by-step explanation:
Solve for x, x+y=-4
Minus y from both sides so it'll be X=-y-4
Now substitute -y-4 in x-y=2 and solve for y
-y - 4 -y=2
Add like terms, -2y - 4=2
Add 4 to both sides -2y=6
Divide both sides by -2
y= -3
Substitute -3 in x=-y - 4
x=-(-3) - 4
- × (-3)= 3
3 - 4= -1
x= -1