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KonstantinChe [14]
4 years ago
14

Need answers for a and b Thank you

Mathematics
1 answer:
Volgvan4 years ago
7 0
A. 6x - 8 = 4; 6x = 12; x = 2

b. 6x - 8 = 1 ; 6x =9; x = 3/2
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Manufacture of a certain component requires three different machining operations. Machining time for each operation has a normal
Sunny_sXe [5.5K]

Answer:

Z = (60 - x + y + z) / √a + b + c

Step-by-step explanation:

Since it is a normal distribution, we must calculate the mean and standard deviation, since we do not have data, what we will do is leave them based on these:

Thus Total Mean time = M1 + M2 + M3

given:

M1 = x

M2 = y

M3 = z

Total Mean Time M = x + y + z

Now to calculate the standard deviation we first calculate the variance.

The total Variance V = V1 + V2 + V3

Given:

V1 = a

V2 = b

V3 = c

V = a + b + c

Thus Standard deviation SD of the complete operation is

SD = √ V

SD = √a + b + c

we need to find the probability that the mean time is less than or equal to 60 minutes, the first thing is to find the value of Z.

Formula of Z is:

Z = (X - M) / SD

In this case X = 60.

On plugging the values we get

Z = (60 - x + y + z) / √a + b + c

refer to the Z table and find the Probability of Z ≤ (60 - x + y + z) / √a + b + c

5 0
4 years ago
PLEASE HELP Write the equation of a line perpendicular to y=2x−3 and goes through the point (4,-1).
dmitriy555 [2]
So for something to be perpendicular the gradient must be the negative reciprocal of your original line so your original gradient is 2 so your new gradient will be -1/2. Then you have y = -1/2 x + c . Now you substitute this into the point (4,-1) to get -1 = -1/2 x 4 + c and -1/2 x 4 = -2 so you have -1 = -2 + c so c = 1 so then you put the equation together to get y = -1/2 x + 1
Hope this helps :))
6 0
4 years ago
The inequality 5m − 7 > 16 holds true for all numbers than in the set {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}.
mash [69]

Answer:

{5, 6, 7, 8, 9, 10}

Step-by-step explanation:

Given the inequality

5m - 7 > 16

Add 7 to both sides

5m-7+7>16+7

5m>23

Divide both sides by 5

5m/5>23/5

m>4.6

Hence the value of m are the values in the set greater than 4.6 and they are {5, 6, 7, 8, 9, 10}

6 0
3 years ago
Please answer quickly and with the write answer.
r-ruslan [8.4K]

(2/5)(1/4) = 2/20 = 1/10

Choice A.

3 0
3 years ago
Slope: 1.5, y-intercept: -1
madreJ [45]

Option 1 is the correct answer

3 0
3 years ago
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