Answer:
A. yes B. no C. no D. yes
Step-by-step explanation:
ur welcome luv
Specifically, price only equals marginal revenue in perfect competition. Price equals MR in perfect competition because your demand curve is horizontal. No matter how much you produce, it always sells at the same price. In other market structures, you can raise or lower prices.
Answer:
length = 194 (97+97)
Step-by-step explanation:
p= 312 width= 59
= 59×2-312
= 118 - 312
= 194
well, is noteworthy that an x-intercept is when y = 0 or namely is a solution or root of the quadratic, so we know then that the x-intercepts or solutions are at (-1,0) and (3,0), that simply means that
![\bf (\stackrel{x}{-1},\stackrel{y}{0})\qquad (\stackrel{x}{3},\stackrel{y}{0})\qquad \begin{cases} x = -1\\ x+1=0\\ \cline{1-1} x=3\\ x-3=0 \end{cases}~\hfill \implies ~\hfill \stackrel{\textit{equation of the parabola}}{y = a(x+1)(x-3)} \\\\\\ \textit{we also know that } \begin{cases} x = 1\\ y = -8 \end{cases}\implies \underline{-8}=a(\underline{1}+1)(\underline{1}-3)](https://tex.z-dn.net/?f=%5Cbf%20%28%5Cstackrel%7Bx%7D%7B-1%7D%2C%5Cstackrel%7By%7D%7B0%7D%29%5Cqquad%20%28%5Cstackrel%7Bx%7D%7B3%7D%2C%5Cstackrel%7By%7D%7B0%7D%29%5Cqquad%20%5Cbegin%7Bcases%7D%20x%20%3D%20-1%5C%5C%20x%2B1%3D0%5C%5C%20%5Ccline%7B1-1%7D%20x%3D3%5C%5C%20x-3%3D0%20%5Cend%7Bcases%7D~%5Chfill%20%5Cimplies%20~%5Chfill%20%5Cstackrel%7B%5Ctextit%7Bequation%20of%20the%20parabola%7D%7D%7By%20%3D%20a%28x%2B1%29%28x-3%29%7D%20%5C%5C%5C%5C%5C%5C%20%5Ctextit%7Bwe%20also%20know%20that%20%7D%20%5Cbegin%7Bcases%7D%20x%20%3D%201%5C%5C%20y%20%3D%20-8%20%5Cend%7Bcases%7D%5Cimplies%20%5Cunderline%7B-8%7D%3Da%28%5Cunderline%7B1%7D%2B1%29%28%5Cunderline%7B1%7D-3%29)
![\bf -8=a(2)(-2)\implies -8=-4a\implies \cfrac{-8}{-4}=a\implies \boxed{2=a} \\\\[-0.35em] ~\dotfill\\\\ y=2(x+1)(x-3)\implies y=2(\stackrel{\mathbb{FOIL}}{x^2-2x-3})\implies y=2x^2-4x-6](https://tex.z-dn.net/?f=%5Cbf%20-8%3Da%282%29%28-2%29%5Cimplies%20-8%3D-4a%5Cimplies%20%5Ccfrac%7B-8%7D%7B-4%7D%3Da%5Cimplies%20%5Cboxed%7B2%3Da%7D%20%5C%5C%5C%5C%5B-0.35em%5D%20~%5Cdotfill%5C%5C%5C%5C%20y%3D2%28x%2B1%29%28x-3%29%5Cimplies%20y%3D2%28%5Cstackrel%7B%5Cmathbb%7BFOIL%7D%7D%7Bx%5E2-2x-3%7D%29%5Cimplies%20y%3D2x%5E2-4x-6)
It is helpful to first plug this in to point-slope form (note that there are other ways to do this).
Using the form
![y-y_1 = m(x-x_1)](https://tex.z-dn.net/?f=y-y_1%20%3D%20m%28x-x_1%29)
, you get
![y-8=-3(x-7)](https://tex.z-dn.net/?f=y-8%3D-3%28x-7%29)
. You can simplify this to get
![y = -3x+29](https://tex.z-dn.net/?f=y%20%3D%20-3x%2B29)
.
Answer choice A