1:5
2 feet long.
3 and 15 simplified equals 1 and 5. So if the building is 10 who's is double 5, then the person is 2.
![y= (\frac 1 4 )^x](https://tex.z-dn.net/?f=%20y%3D%20%28%5Cfrac%201%204%20%29%5Ex)
A reflection about the x axis, about y=0, is the mapping (x',y')=(x,-y) so
![y'= -y = - (\frac 1 4)^{x'}](https://tex.z-dn.net/?f=y%27%3D%20-y%20%3D%20-%20%28%5Cfrac%201%204%29%5E%7Bx%27%7D)
A dilation of 2 is the mapping (x'',y'')=(2x', 2y')
So
![x'=x''/2, y'=y''/2](https://tex.z-dn.net/?f=x%27%3Dx%27%27%2F2%2C%20y%27%3Dy%27%27%2F2)
![y''/2= - (\frac 1 4)^{x''/2}](https://tex.z-dn.net/?f=%20y%27%27%2F2%3D%20-%20%28%5Cfrac%201%204%29%5E%7Bx%27%27%2F2%7D)
![y'' = - 2((\frac 1 4)^{1/2})^{x''}](https://tex.z-dn.net/?f=%20y%27%27%20%3D%20%20-%202%28%28%5Cfrac%201%204%29%5E%7B1%2F2%7D%29%5E%7Bx%27%27%7D)
![y''= - 2(\frac 1 2)^{x''}](https://tex.z-dn.net/?f=%20y%27%27%3D%20-%202%28%5Cfrac%201%202%29%5E%7Bx%27%27%7D)
We can rewrite that without the primes and combine the powers of 2.
![y = - 2^{1-x}](https://tex.z-dn.net/?f=y%20%3D%20%20-%202%5E%7B1-x%7D)
Let's graph these and see if we're close,
Plot y= (1/4)^x, y= - (1/4)^{x}, y = - 2^{1-x}
Answer:
x = -0.5
Step-by-step explanation:
From your last step:
6.8x + 9.3 = -2.6 - 17x
We have two terms with x in them on different sides of the equation, so we want to bring the 'x terms' over to the same side.
Add 17x to both sides of the equation.
6.8x + 17x + 9.3 = -2.6
Collect like terms
23.8x + 9.3 = -2.6
Subtract 9.3 from both sides
23.8x = -2.6 - 9.3
23.8x = -11.9
Divide both sides by 23.8
x = -0.5
The credit card is instant. She’d have to ship the money order and the check to the supplier.