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oksano4ka [1.4K]
4 years ago
9

Please help me now plz I promise I will mark you brainliest

Mathematics
1 answer:
VARVARA [1.3K]4 years ago
6 0

Answer:

x=17.691

Step-by-step explanation:

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What is the best way to answer this mixed number 7 3/4 + 1 5/6
olga_2 [115]

9514 1404 393

Answer:

  9 7/12

Step-by-step explanation:

12 is a suitable common denominator.

  (7 3/4) + (1 5/6) = (7 9/12) + (1 10/12) = (7+1) +(9/12 +10/12)

  = 8 + 19/12 = 9 + 7/12 . . . . . . change 19/12 to 1 7/12

  = 9 7/12

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My calculator works with mixed numbers very nicely, as many graphing calculators do.

8 0
3 years ago
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Manufacture of a certain component requires three different machining operations. Machining time for each operation has a normal
faust18 [17]

Answer:

The probability is  P(X \le 70) =  0.9685

Step-by-step explanation:

From the question we are told that

The mean values is M_1 =  15 \ minutes ,  \  M_2 =  30\ minutes, \  M_3 =  20 \ minutes

The standard deviation is \sigma_1 =  1  \  minutes ,  \  \sigma_2 =  2 \ minutes  ,  \  \sigma =  1.5 \  minutes

Generally the total mean is mathematically represented as

         \= x =  \sum M_i

=>     \= x  =  15 + 30 + 20

=>    \= x =  65

Generally the total variance is  mathematically represented as

     V(x) =  \sum \sigma^2_i

=>  V(x) =  2^2 + 1^2 +  1.5^2

=>  V(x) = 7.25

Generally the total standard deviation is mathematically represented as

        \sigma =  \sqrt{V(x)}

=>     \sigma =  \sqrt{7.25 }

=>     \sigma =  2.69

Generally the probability that it takes at most 70 min of machining time to produce a randomly selected component is mathematically represented as

        P(X \le 70) =  1 - P( X > 70 )

Here  P(X > 70) =  P(\frac{X - \mu }{\sigma}  >  \frac{70 -  65}{ 2.69} )

\frac{X -\mu}{\sigma }  =  Z (The  \ standardized \  value\  of  \ X )

        P(X > 70) =  P(Z >  1.8587 )

From the z table  

  The area under the normal curve to the right corresponding to  1.8587 is

        P(Z >  1.8587 ) = 0.031535

So

      P(X \le 70) =  1 - 0.031535

=>  P(X \le 70) =  0.9685

7 0
3 years ago
Look at my favorite player​
lawyer [7]

Answer:

who was that is TD's wrld

4 0
3 years ago
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PLEASE HELP!! I'LL GIVE YOU THE BRAINLIEST!!!
disa [49]

1.  C. 130 = 1.5p-50

2. C. $3.19

4.(-6,12); (2,8)

5. (2,-9)

Hope this helps. :)

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3 years ago
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I don't understand ÷ fractions
Reptile [31]
Ok. so, you have a fraction. lets say it is, 5/20. and the other, is. 2/5. flip the first one, and multiply. so your answer would be, 25/40. hope this helps.
7 0
4 years ago
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