Answer:
48.16
Step-by-step explanation:
Answer:
Step-by-step explanation:
Answer:

Step-by-step explanation:
if you want it simplified it is 
Answer:

Step-by-step explanation:
The average speed in function of the temperature:

The distance in function of the average speed:

x and S are the same
![D(t)=0.5*[6 \frac{miles}{hour} +0.1*\frac{miles}{hour*F}(80F-t)]](https://tex.z-dn.net/?f=D%28t%29%3D0.5%2A%5B6%20%5Cfrac%7Bmiles%7D%7Bhour%7D%20%2B0.1%2A%5Cfrac%7Bmiles%7D%7Bhour%2AF%7D%2880F-t%29%5D)

Wow. Ok, really simple, honestly. Because 3(5x) = 15x. (3*5)(3*x) = 3*5 = 15*3 = 45x. Therefore, 15x and 45x do not correspond to each other at all, meaning that 3(5x) is not equivalent to (3*5)(3*x)!!!