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2 years ago

Simplify (3x2 – 4x – 1) + (8x2 – x + 6)

Mathematics

1 answer:

abruzzese [7]2 years ago

6 0

Answer:

$11x^{2} -5x+5$

Step-by-step explanation:

$3x^{2}-4x-1+8x^{2} -x+6$

$3x^{2}+8x^{2}-4x-x-1+6$

Combine like terms

$11x^{2}-5x +5$

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Suppose the cost of publishing x books is C(x) = 10000 + 25<img src="https://tex.z-dn.net/?f=%5Csqrt%7Bx%7D" id="TexFormula1" ti

dusya [7]

Answer:

$\frac{dC}{dQ} \approx 1.25$ , $C(101)-C(100) = 1.247$ , $\delta = 0.24\,\%$

Step-by-step explanation:

The marginal cost function is:

$\frac{dC}{dQ} = 12.5\cdot x^{-\frac{1}{2} }$

The marginal cost for 100 books is:

$\frac{dC}{dQ} \approx 1.25$

The difference is:

$C(101)-C(100) = 25\cdot (101^{\frac{1}{2} }-100^{\frac{1}{2} })$

$C(101)-C(100) = 1.247$

The relative error is:

$\delta = \frac{|1.25-1.247|}{1.25}\times 100\,\%$

$\delta = 0.24\,\%$

6 0

3 years ago

PLS HELP MEE ASAP 1 MIN LEFT HELPP!!!!!!!!!

artcher [175]

Answer: BC = 5.83

Step-by-step explanation:

Luckily, the triangle is placed on the graph nicely so we can count the legs of the triangle:

AB = 5

AC = 3

BC = ?

To find BC, we can simply use the Pythagorean Theorem:

$a^{2}+b^{2}=c^{2}$

5^2 + 3^2 = c^2

25 + 9 = c^2

34 = c^2

Now square root to find c, or BC.

$\sqrt{34}=\sqrt{c^{2} }$

c = 5.83 (rounded by nearest hundredth)

4 0

2 years ago

Find the average of 8.4 7.5 12.9 and 10.6 also the method how to do it

SashulF [63]

Find the average :8.4+7.5+12.9+10.6 divided by four

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2 years ago

What is 214729.08 rounded to nearest thousand

nata0808 [166]

Hello!!

214,729.08 rounded to nearest thousand is 215,000.

And, 214,729.08 rounded to nearest thousandths (3 decimals) is 214,729.080.

Good luck :)

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3 years ago

Find the slope of (-2,1),(-2,2)

Natalija [7]

Answer:

there is no slope its undefined

Step-by-step explanation:

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2 years ago