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Archy [21]
3 years ago
8

Find the value: cos -1 ( - √3/2 )

Mathematics
1 answer:
Natasha2012 [34]3 years ago
7 0

Answer:

The value is undefined.

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A senior paid $3.47, $9.50 and $2.50 for lunch during a basketball tournament. What was the average amount he paid over three da
cestrela7 [59]

Answer:

The average amount he paid over 3 days is $15.47.

Step-by-step explanation:

4 0
2 years ago
Can someone please do this for me?
lapo4ka [179]
MB = 6y+26
hope it helped :D
4 0
2 years ago
PLEASE help
astraxan [27]

Answer:

The percentage of people should be seen by the doctor between 13 and

17 minutes is 68% ⇒ 2nd term

Step-by-step explanation:

* Lets explain how to solve the problem

- Wait times at a doctor's office are typically 15 minutes, with a standard

 deviation of 2 minutes

- We want to find the  percentage of people should be seen by the

 doctor between 13 and 17 minutes

* To find the percentage we will find z-score

∵ The rule the z-score is z = (x - μ)/σ , where

# x is the score

# μ is the mean

# σ is the standard deviation

∵ The mean is 15 minutes and standard deviation is 2 minutes

∴ μ = 15 , σ = 2

∵ The people should be seen by the doctor between 13 and

   17 minutes

∵ x = 13 and 17

∴ z = \frac{13-15}{2}=\frac{-2}{2}=-1

∴ z = \frac{17-15}{2}=\frac{2}{2}=1

- Lets use the standard normal distribution table

∵ P(z > -1) = 0.15866

∵ P(z < 1) = 0.84134

∴ P(-1 < z < 1) = 0.84134 - 0.15866 = 0.68268 ≅ 0.68

∵ P(13 < x < 17) = P(-1 < z < 1)

∴ P(13 < x < 17) = 0.68 × 100% = 68%

* The percentage of people should be seen by the doctor between

  13 and 17 minutes is 68%

6 0
2 years ago
I need help ASAP pls
telo118 [61]

Answer:

Infinite: 2x+7=2+7

One solution= 2x-5= 10

No solution= 2x+7=2x-6

Step-by-step explanation:

7 0
3 years ago
The temperature dropped from 12° to 8° this was drop of how many degrees
lapo4ka [179]

Answer:

4°

Step-by-step explanation:

12-8=4

therefore the answer would be 4 degrees

6 0
3 years ago
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