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3 years ago

11

A linear cost function is c(x) = 4x + 300.what is the cost of producing one more item if 50 are currently being produced?

1 answer:

lakkis [162]3 years ago

7 0

Sent a picture of the solution to the problem (s).

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Numbers are (-20,10) and (40,-50)

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Hdbanwlsksmaakdicjcjdndisisushshsudhehehhs

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3 years ago

The left and right page numbers on an

liubo4ka [24]

The pages would be 166 and 167

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3 years ago

Is this a function? plz help me i need help

LenaWriter [7]

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2 years ago

Look at picture. Does anybody know the answer I’m lost?

masha68 [24]

Let $x,y$ be the dimensions of the rectangle. We know the equations for both area and perimeter:

$A=xy=36$

$P=2(x+y)=36 \iff x+y=18$

So, we have the following system:

$\begin{cases}xy=36\\x+y=18\end{cases}$

From the second equation, we can deduce

$y=18-x$

Plug this in the first equation to get

$xy=x(18-x)=-x^2+18=36$

Refactor as

$x^2-18x+36=0$

And solve with the usual quadratic formula to get

$x=9\pm3\sqrt{5}$

Both solutions are feasible, because they're both positive.

If we chose the positive solution, we have

$x=9+3\sqrt{5} \implies y=18-x=18-9-3\sqrt{5}=9-3\sqrt{5}$

If we choose the negative solution, we have

$x=9-3\sqrt{5} \implies y=18-x=18-9+3\sqrt{5}=9+3\sqrt{5}$

So, we're just swapping the role of $x$ and $y$ . The two dimensions of the rectangle are $9+3\sqrt{5}$ and $9-3\sqrt{5}$

6 0

2 years ago

2x^2-5x+1=0 solve using quadratic formula

Gnesinka [82]

Answer:

x=(5±√17)/4, or x ≈ 2.281 and 0.219

Step-by-step explanation:

$2x^{2} -5x+1\\$

plug into quadratic formula

$5+- \sqrt{(-5)-4(2)(1)}/2(2)$

simplify

$5+-\sqrt{25-8} /4$

$\frac{5+-\sqrt{17} }{4}$ ≈ 2.281 and 0.219

5 0

3 years ago