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Licemer1 [7]
2 years ago
12

Solve for c7c + 3 - 7c = 3c - 9​

Mathematics
2 answers:
vfiekz [6]2 years ago
5 0

Answer:

4=c

Step-by-step explanation:

7c + 3 - 7c = 3c - 9​

Combine like terms

7c-7c+3 = 3c-9

3 = 3c-9

Add 9 to each side

3+9 = 3c-9+9

12 = 3c

Divide each side by 3

12/3 = 3c/3

4 =c

Ghella [55]2 years ago
4 0

Answe

c=−4/3

Step-by-step explanation:

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The confidence level would be 99.5%.

When we know the confidence level, we find the z-score by:
Dividing the CL by 100;
Subtracting this result from 1;
Dividing this result by 1;
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Algebraically, this looks like:
1-(\frac{1-(\frac{CL}{100})}{2})

Using a z-table (http://www.z-table.com), we see that a z-score of 2.81 results in an area under the curve of 0.9975, so we now have
1-(\frac{1-(\frac{CL}{100})}{2})=0.9975

To begin solving this, we will subtract 1 from both sides:
-(\frac{1-(\frac{CL}{100})}{2})=-0.0025
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We will now multiply both sides by 2:
1-\frac{CL}{100}=0.005

Subtract 1 from both sides:
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7 0
2 years ago
The walls of a storage building are built from stone. The stonework costs $5.50 per square foot. The building is 12 feet by 15 f
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Step-by-step explanation:

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Step-by-step explanation:

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The range of thickness "x" that fits the inequality is:

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7 0
2 years ago
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