Hey there!
Functions are basically like machines you put a number into and they give you a new one as an output. This f represents this machine. f(x) represents whatever the output is because it is the x after it has gone through the function machine.
We want to figure out what x is when f(x)=12. Well, we can simply replace f(x) with 12 in the first equation and solve for x!
12=-16x+8
We flip the equation so x is on the left side.
-16x+8=12
We subtract 8 from both sides.
-16x=4
We divide both sides by -16.
x=-1/4
Have a wonderful day! :D
Answer:
Step-by-step explanation:
3 cups of water + jug = 2.25 lbs
jug = .75 lbs
3 cups of water = 1.5 lbs
1 cup of water = .5 lbs
Therefore,
y = .75 + .5x
The rise is 1 and the run is 2 so 1/2 since slope is rise over run.
The slope is .32m, It means that is the fee charged PER MILE DRIVEN. The slope is always the number before any variable like x.
The proof for number 3 is SSS theorem.