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marta [7]
2 years ago
5

2x - 3y --24 x + 6y = 18 Substitution

Mathematics
1 answer:
V125BC [204]2 years ago
6 0

Answer:

y=12

x=30

Step-by-step explanation:

2x-3y=24 ... 1

x+6y=18 ... 2

2*2:

2x+12y=36...3

3-1:

y=12

x=30

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The manufacturing of a ball bearing is normally distributed with a mean diameter of 22 millimeters and a standard deviation of .
Misha Larkins [42]

Answer:

0.1507 or 15.07%.

Step-by-step explanation:

We have been given that the manufacturing of a ball bearing is normally distributed with a mean diameter of 22 millimeters and a standard deviation of .016 millimeters. To be acceptable the diameter needs to be between 21.97 and 22.03 millimeters.

First of all, we will find z-scores for data points using z-score formula.

z=\frac{x-\mu}{\sigma}, where,

z = z-score,

x = Sample score,

\mu = Mean,

\sigma = Standard deviation.

z=\frac{21.97-22}{0.016}

z=\frac{-0.03}{0.016}

z=-0.1875

Let us find z-score of data point 22.03.

z=\frac{22.03-22}{0.016}

z=\frac{0.03}{0.016}

z=0.1875

Using probability formula P(a, we will get:

P(-0.1875

P(-0.1875  

P(-0.1875

Therefore, the probability that a randomly selected ball bearing will be acceptable is 0.1507 or 15.07%.

6 0
3 years ago
Plss it due today plssss don’t just take the points
Murljashka [212]

Answer:

Step-by-step explanation:

3x + 11 + x - 9 + 56 = 180

4x + 58 = 180

4x = 122

x = 30.5

6 0
3 years ago
I need the answer pleaseeeeeeeee
Vaselesa [24]
I'm thinking you would have to add the probabilities that you choose a boy with you choose someone in the science club minus a boy in the science club. You can't count these people twice. I'm getting 59% (11+10-2)/32
7 0
2 years ago
What is the value of n in this equation?<br>n+ 134 = 379<br>423<br>245<br>334​
alexira [117]

Answer:

the answer to this question is 245

Step-by-step explanation:

n+134=379

-134 -134

n=245

5 0
3 years ago
Read 2 more answers
Find total surface area
earnstyle [38]
7x9 = 63
63x2 = 126
126 is the surface area
5 0
2 years ago
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