135 degrees is your answer
Answer:
The profit decreases by $ 375 for every $ 1 increase in the selling price.
Step-by-step explanation:
From the definition of the secant line we get that the average rate of change of
, where
is the selling price of the product, measured in dollars per unit, is:
(1)
Now we evaluate the function at each bound:
x = 50
![P(50) = -0.015\cdot (50)^{2}+1.2\cdot (50)-11.5](https://tex.z-dn.net/?f=P%2850%29%20%3D%20-0.015%5Ccdot%20%2850%29%5E%7B2%7D%2B1.2%5Ccdot%20%2850%29-11.5)
![P(50) = 11](https://tex.z-dn.net/?f=P%2850%29%20%3D%2011)
x = 55
![P(55) = -0.015\cdot (55)^{2}+1.2\cdot (55)-11.5](https://tex.z-dn.net/?f=P%2855%29%20%3D%20-0.015%5Ccdot%20%2855%29%5E%7B2%7D%2B1.2%5Ccdot%20%2855%29-11.5)
![P(55) = 9.125](https://tex.z-dn.net/?f=P%2855%29%20%3D%209.125)
Then, the average rate of change is:
![r = \frac{9.125-11}{55-50}](https://tex.z-dn.net/?f=r%20%3D%20%5Cfrac%7B9.125-11%7D%7B55-50%7D)
![r = -0.375](https://tex.z-dn.net/?f=r%20%3D%20-0.375)
Hence, the profit decreases by $ 375 for every $ 1 increase in the selling price.
Answer:
z=-75/17
Step-by-step explanation:
Expand this equation:
-4z+8+4=-21z-63
-4z+21z=-63-8-4
17z=-75
z=-75/17
5 + 17a is the answer you are looking for