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AfilCa [17]
2 years ago
10

(x - 2(x + 7) = 0 pls help​

Mathematics
1 answer:
nirvana33 [79]2 years ago
5 0

Step-by-step explanation:

(x - 2(x + 7) \\ (x - 2x - 14) \\ ( - x - 14)

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16(6t-3)= 200 what does t=?
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Answer:2.58

Step-by-step explanation:

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PLEASE ITS EASY I FOGOT HOW TO DO IT
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Jamie bought medicine priced at $180 she had to pay 5% sales tax and an additional 1.5% for handling fee how much money did she
alekssr [168]

Answer:

$191.70

Step-by-step explanation:

total amount spent = cost of medicine + cost of tax + cost of shipping

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8 0
3 years ago
A random sample of 100 workers in one large plant took an average of 12 minutes to complete a task, with a standard deviation of
SCORPION-xisa [38]

Answer:

The 95% Confidence Interval for the difference between the two population mean completion times =

(0.081, 1.919)

Step-by-step explanation:

Confidence Interval for difference between two means =

μ1 -μ2 ± z × √ σ²1/n1 + σ²2/n2

Where

μ1 = mean 1 = 12 mins

σ1 = Standard deviation 1 = 2 mins

n1 = 100

μ2= mean 2 = 11 mins

σ2 = Standard deviation 2 = 3 mins

n1 = 50

z score for 95% confidence interval = 1.96

μ1 -μ2 ± z × √ σ²1/n1 + σ²2/n2

= 12 - 11 ± 1.96 × √2²/100 + 3²/50

= 1 ± 1.96 × √4/100 + 9/50

= 1 ± 1.96 × √0.04 + 0.18

= 1 ± 1.96 × √0.22

= 1 ± 1.96 × 0.469041576

= 1 ± 0.9193214889

Confidence Interval

= 1 - 0.9193214889

= 0.0806785111

≈ 0.081

1 + 0.9193214889

= 1.9193214889

≈ 1.919

Therefore, the 95% Confidence Interval for the difference between the two population mean completion times =

(0.081, 1.919)

5 0
3 years ago
david, another student in the classdecides to sell hot chocolate for $0.75 per cup. He began to record his earnings below. the t
Fed [463]

Answer: $787

Step-by-step explanation:

4 0
3 years ago
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