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Iteru [2.4K]
3 years ago
10

Three times a number plus 12 minus 5 times the same number is 22. What is the number?

Mathematics
1 answer:
JulijaS [17]3 years ago
3 0
3x + 12 - 5x = 22
-2x + 12 = 22
-2x = 10
x = -5

Write the equation out, x is going to be your unknown number.
Combine like terms.
We have to isolate x, so get rid of the 12 by subtracting it from both sides of the equation.
Divide by -2.
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stiv31 [10]

Answer:

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Step-by-step explanation:

Given that:

Mean number of miles (m) = 2135 miles

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probability that the mean of a sample of 40 cars would differ from the population mean by less than 29 miles

P( 2135 - 29 < z < 2135 + 29)

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Z = [(2106 - 2135) / 382 / √40] < z < [(2164 - 2135) / 382 / √40]

Z = (- 29 / 60.399503) < z < (29 / 60.399503)

Z = - 0.4801364 < z < 0.4801364

P(Z < - 0.48) = 0.31561

P(Z < - 0.48) = 0.68439

P(- 0.480 < z < 0.480) = 0.68439 - 0.31561 = 0.36878

= 0.36878

3 0
2 years ago
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Leya [2.2K]

Answer:

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6 0
3 years ago
Read 2 more answers
Help !!!!!!!!!!!!!!!!
umka2103 [35]

Answer:

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Step-by-step explanation:

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Cos 52 = x / 14

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4 0
3 years ago
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