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Maksim231197 [3]
3 years ago
12

Simplify the following expression by combining like terms: - 2 +63 +2 - 2x + 8 - 4:

Mathematics
1 answer:
tangare [24]3 years ago
5 0

Answer:

6+4x-3z

Step-by-step explanation:

<u>-2</u>+6x+z-2x<u>+8</u>-4z

6<u>+6x</u>+z<u>-2x</u>-4z

6+4x<u>+z-4z</u>

6+4x-3z

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Liza gets paid $5.50 an hour to babysit her little cousins. Last weekend, she watched them for three hours on Friday, nine hours
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Answer: B (104.50)

explanation: 5.5*3=16.5
5.5*9=49.5
5.5*7=38.5

16.5, 49.5, and 38.5 added all together is 104.5 or $104.50

4 0
2 years ago
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Teacher's salaries in Georgia are normally distributed with an average salary of $52,000 with a standard deviation of $12,000. W
suter [353]

Answer:

81.85%

Step-by-step explanation:

We have the following information:

mean = m = 52000

standard deviation = sd = 12000

a = 40000

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we need to find the probability between a and b, that is:

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replacing

P [(40000 - 52000) / 12000 <z <(76000 - 52000) / 12000]

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2 years ago
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2 years ago
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Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2
8090 [49]

Answer:

tanΘ = - \frac{12}{5}

Step-by-step explanation:

Using the trigonometric identities

• sin²x + cos²x = 1, hence

cosx = ± √(1 - sin²x )

• tanx = \frac{sinx}{cosx}

given sinΘ = \frac{12}{13}, then

cosΘ = ±  \sqrt{1-(12/13)^2}

Since Θ is in the second quadrant where cosΘ < 0, then

cosΘ = - \sqrt{1-\frac{144}{169} }

         = - \sqrt{\frac{25}{169} } = - \frac{5}{13}

tanΘ = \frac{\frac{12}{13} }{\frac{-5}{13} }

        = \frac{12}{13} × - \frac{13}{5} = - \frac{12}{5}



5 0
3 years ago
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Yuri [45]

Answer:

b

Step-by-step explanation:

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1 year ago
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