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Harlamova29_29 [7]
3 years ago
11

Can someone solve or explain to me how to do this?

Mathematics
1 answer:
Andreyy893 years ago
7 0

Answer:

a) x=5

b) x=6

Step-by-step explanation:

a)

3x+7=180-(10x-22)

3x+7=202-10x

13x=195

x=5

b)

11x-3=4x+39

7x=42

x=6

I am so sorry I forgot what the formula names are but these are the correct solutions. It has been a while since I've done Geometry.

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Abraham ha $16 to spend on five pencils. After buying them, he has $6.25 left. How much was each pencil?​
Serhud [2]

Answer:

$ 1.95 per pencil

Step-by-step explanation:

16 - 6.25 = 9.75

9.75 / 5 = 1.95

3 0
2 years ago
The taxi and takeoff time for commercial jets is a random variable x with a mean of 8.4 minutes and a standard deviation of 3.5
Lorico [155]

Answer:

0.6672 is the required probability.            

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 8.4 minutes

Standard Deviation, σ = 3.5 minutes

We are given that the distribution of distribution of taxi and takeoff times is a bell shaped distribution that is a normal distribution.

According to central limit theorem the sum measurement of n is normal with mean \mu and standard deviation \sigma\sqrt{n}

Sample size, n = 37

Standard Deviation =

=\sigma\times \sqrt{n} = 3.5\times \sqrt{37}=21.28

P(taxi and takeoff time will be less than 320 minutes)

P( \sum x < 320) = P( z < \displaystyle\frac{320 - 37(8.4)}{21.28}) = P(z < 0.4323)

Calculation the value from standard normal z table, we have,  

P(\sum x < 320) =0.6672 = 66.72\%

0.6672 is the probability  that for 37 jets on a given runway, total taxi and takeoff time will be less than 320 minutes.

7 0
3 years ago
Instructions are in the picture
Phantasy [73]

Answer:

123123 3213123 12312 dasdsd aw dasd sda asdasd

Step-by-step explanation:

3 0
3 years ago
18<br> What is the value of x?<br> O<br> 3<br> 10<br> 2y + 4<br> 10 + 2x<br> 000
borishaifa [10]

Answer:

10 = 2y + 4

6 = 2y

y = 3

Step-by-step explanation:

18 = 10 + 2x

8 = 2x

x = 4

7 0
3 years ago
50 points Type the correct answer I’m the box
Nonamiya [84]
I only see a black image, can you resend the image? or type it out here
6 0
3 years ago
Read 2 more answers
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