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seraphim [82]
3 years ago
15

Nakita recorded a video of homecoming highlights of the senior class and now everybody wants a copy. She promised to have 25 rea

dy the next day but suddenly realized that it will take her ten hours to do that. Her friend, Abby, volunteered to help and she can do the job alone in 15 hours. How long will it take the girls, working together, to complete the job?
Mathematics
1 answer:
alexira [117]3 years ago
8 0
I would take  because it would take nakita 1 hour to do 2 and a half herself and it would take abby 1 2/3 to do it herself
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2 years ago
Find the acute angle between the two given lines<br><br> y=-2x and y=x
Marina CMI [18]

Answer:

θ ≈ 71.6°

Step-by-step explanation:

The angle between two lines with slopes m₁ and m₂ is:

tan θ = | (m₂ − m₁) / (1 + m₁m₂) |

Here, m₁ = -2 and m₂ = 1.

tan θ = | (1 − (-2)) / (1 + (-2)(1)) |

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3 0
3 years ago
Ok, now i need help from 1-5, 20 points
ratelena [41]

1 = 8

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Solving Inequalities
Zepler [3.9K]

Answer:

n > 10

n < 9

Interval notation:

(-∞, 9) U (10, ∞)

Step-by-step explanation:

2n + 7 > 27 or 3 + 3n < 30

     -7     -7      -3             -3

2n > 20                 3n < 27

÷2    ÷2                ÷3     ÷3

n > 10                      n < 9

<---------            ----------->

<---------0--------0--------->

           9         10

I hope this helps!

6 0
1 year ago
Read 2 more answers
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