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2 years ago

If 2x+5= 12 for some value of x, then what does 6x+20 equal???

Mathematics

2 answers:

ANEK [815]2 years ago

6 0

1. Solve for x in 2x + 5 = 12
2x + 5 = 12 Subtract 5 from both sides.
2x = 7 Divide 2 from both sides.
x = 3.5

2. Substitute 3.5 in for x in 6x + 20
6(3.5) + 20
21 + 20
41

Your answer is 41.

Morgarella [4.7K]2 years ago

5 0

Here is the answer to the question

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Juarez Distribution Company conducted a time study of Martha Smith’s job as an installer. Using the observation chart, find her

Alex777 [14]

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3 years ago

Find the population variance of: 4 6 8 9 9 <br><br> round to the nearest hundredth

soldi70 [24.7K]

Answer:

Step-by-step explanation:

To find the population variance, we first need the mean:

$\bar{x}=\frac{4+6+8+9+9}{5}=\frac{36}{5}=7.2$ so the mean is 7.2. To find the population variance (which is almost exactly the same as the sample variance except for a small difference in the denominators of the formula) we have to take each number minus the mean, and then square the difference. Add together all these squared numbers and then divide by the number of numbers. Like this:

$(4-7.2)^2=10.24\\(6-7.2)^2=1.44\\(8-7.2)^2=.64\\(9-7.2)^2=3.24\\(9-7.2)^2=3.24$

Add together those numbers and divide them by 5:

$\sigma=\frac{10.24+1.44+.64+3.24+3.24}{5}=\frac{18.8}{5}=3.76$

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2 years ago

Add the following military times: 1355 + 0540

Mnenie [13.5K]

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3 years ago

Pythagorean theorem to determine if a triangle with sides 2 ft,5ft,4ft is a right triangle

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$a^2 + b^2 = c^2$

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Since 20 = 25 is clearly a false statement, the three side lengths 2 ft, 4 ft, and 5 ft do not form a right triangle.

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3 years ago

What numbers add to 21 but equal 472

Anastaziya [24]

Hey there,

All we have to do is 472-21=451

So your number would be 451

8 0

2 years ago

Read 2 more answers