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4 years ago

Which expression is equivalent to the given expression? 2n−6

Mathematics

2 answers:

Step2247 [10]4 years ago

4 0

Answer:

the answer would be: D. 2(n-3)

Daniel [21]4 years ago

4 0

Answer:

D) 2(n-3)

because when you distribute it's 2n-6

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The cost C (in dollars) of building a house is related to the number k of carpenters used and the number e of electricians used

riadik2000 [5.3K]

$C = 15000 + 50k^2 + 60e^2 \Rightarrow \\
\frac{dC}{de} = \frac{d}{de} 50k^2 + \frac{d}{de} 60e^2 \Rightarrow \\
\frac{dC}{de} = 100k\frac{dk}{de} + 120e\\
Cost\ of\ house\ is\ fixed\ so\ \frac{dC}{de} = 0 \\
0 = 100k\frac{dk}{de} + 120e\ \Rightarrow\ -120e = 100k\frac{dk}{de} \ \Righarrow \\ \frac{dk}{de} = -\frac{6e}{5k} \\

$

find k when e = 15

$100000 = 15000 + 50k^2 + 60(15)^2 \Rightarrow k = \sqrt{1430}$

$\frac{dk}{de} = -\frac{6e}{5k} = -\frac{6(15)}{5\sqrt{1430}} = -0.476$

inst rate of carpenters with 15 <span>electricians:</span> decreasing at 0.476 carpenters per electrician

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3 years ago

What was the biggest

SSSSS [86.1K]

Answer:

The biggest decrease in time from the 1st leg and the 2nd leg is:

1st leg: 55.037 seconds

2nd leg: 40.38 seconds

Step-by-step explanation:

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3 years ago

Read 2 more answers

11. A tournament has 12 hockey teams participating. Find the number of different ways that teams can win gold, silver, and bronz

lara [203]

Since order is important...

12!/(12-3)!=1320

or if you prefer

12*11*10=1320

8 0

3 years ago

Which of the following is the equation of a line that passes through the point (1,4) and is parallel to the x-axis?

Alexandra [31]

A because , well Y=4 and the points y coordinate is 4. And when a line is Y= a certain number, its a horizontal line parallel to x axis

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3 years ago

Plz help. My brain is melted.

AlexFokin [52]

Answer:

The answer is 4.

Step-by-step explanation:

if you havent figured that our already.

‍♀️

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3 years ago

Which expression is equivalent to the given expression? ​2n−6​

Which expression is equivalent to the given expression? 2n−6