Answer:
the answer you have is correct
360 - 160 - 60 = 140
<span><y = 1/2 * 140 = 70
Hope this helps
</span>
This is a simple differentiation problem. Let's start by taking the derivative of both sides (with respect to x):

Simplify:

Solve for dy/dx:

Now, plug in the given points:

Further simplification gives:

So,
your answer is 11/23 or
B.
Add the prices together
Then divide by 3.
*6.25 + 3.25 = 9.50/3 = 2 of them pay 3.16 while the other pays 3.17.
15% = 0.15
15% of 71.85 is equal 0.15*71.85 ≈ 10.78