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enot [183]
3 years ago
9

-4(8n-3)=84 how do i do this

Mathematics
1 answer:
Svet_ta [14]3 years ago
7 0
Best to ask, "How do I solve this equation for n?"

1.  Div. both sides by -4, along the way to isolating 8n-3 and then n:
     8n-3 = -21
2.  Add 3 to both sides:   8n = -18
3.  Solve for n:                   n = -18/8 = -9/4 (answer)
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3 years ago
Helppp!!!! please!!!
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Step-by-step explanation:

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Hiking up a mountain, you notice that the air temperature drops 10 degrees every 1000 meters increase in elevation. Write a mult
Elina [12.6K]

 decrease in temperature if you hike up the mountain 3000 meters is  -30° .

<u>Step-by-step explanation:</u>

Here we have , Hiking up a mountain, you notice that the air temperature drops 10 degrees every 1000 meters increase in elevation . We need to find Write a multiplication expression to represent the decrease in temperature if you hike up the mountain 3000 meters. Let's find out:

For every 1000 meters rise in elevation , there is decrease in 10° of temperature . So , For rise in n meters in  elevation , there is decrease in n×10° of temperature i.e

Decrease in temperature = (n/1000)×(-10) i.e.

⇒  (n/1000)×(-10)

⇒ \frac{n}{1000}(-10)

At n = 3000 meters:

⇒ \frac{3000}{1000}(-10)

⇒ 3}(-10)

⇒ -30°  

Therefore ,  decrease in temperature if you hike up the mountain 3000 meters is  -30° .

8 0
3 years ago
I know its big...sorry for that, but i really need the awnsers -_-
BlackZzzverrR [31]

Answer:

#20 is irrational,  #24 is 33/100, and #25 is 0  

Step-by-step explanation:

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