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ser-zykov [4K]
4 years ago
11

Find The Value Of X.

Mathematics
1 answer:
Aleksandr-060686 [28]4 years ago
6 0

Answer:

Tan 30 =, 14/x

Then x= 14/tan 30

So x=14 root 3

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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

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∵ 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

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

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

  13 and 17 minutes is 68%

6 0
3 years ago
Ann spent $7.74 on oranges. If each orange costs $0.36 per pound, how many pounds of oranges did Ann buy?
solmaris [256]
Set variables for the quantities we want to find. Let x = number of applesLet y = number of oranges  Next, we use these variables to write equations that describes the whole story. Since the total price is $7.75 and each type of fruit has their own price, we can say 0.40x + 0.35y = 7.55  The other equation will represent the total number of fruits bought all together, as Mark mentioned.  Once you have those equations, you solve the system using substitution and elimination methods to solve for the variables x and y.
4 0
3 years ago
Read 2 more answers
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