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stiv31 [10]
3 years ago
9

How do you solve this whole thing please?

Mathematics
1 answer:
NemiM [27]3 years ago
7 0

Answer:

Step-by-step explanation:

Let's look at the first two, and hopefully you'll be able to figure the rest out:

1. Answer below

d = rt

The problem asks us to solve for r, so that means we need to get r on one side of the equation by itself. To do so, we will need to divide both sides of the equation by t:

\frac{d}{t} = \frac{rt}{t}

\frac{d}{t} = r

2. Answer below

B = T - Lc

The problem asks us to solve for T, so that means we need to get T on one side of the equation by itself. To do so, we will need to add Lc to both sides of equation:

B + Lc = T - Lc + Lc

B + Lc = T

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3 years ago
Write the expression 18 - 27-9 in the form of a +bi.
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A 9<br> B 18<br> C 4.5<br> D 19<br><br> Thanks
irina1246 [14]

Answer:

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Step-by-step explanation:

7 0
3 years ago
Extreme cold and hot temperatures are known to affect the operation of electronic components. Winter is approaching and you are
Musya8 [376]

Answer:

A 95% confidence interval for the true mean minimum temperature that will damage an iPod is between 2.55°F and 7.45°F

Test statistic(Z) = 2.31

P-value = 0.0104

Step-by-step explanation:

Step 1

Null hypothesis: The average damaging temperature of nine iPods is 5°F

Alternate hypothesis: The average damaging temperature of nine iPods differs from 5°F

Step 2

Mean=5°F, Sd=3, df=n-1=9-1=8

The t-value corresponding to 8 degrees of freedom and 95% confidence level (5% significance level) is 2.306

Confidence Interval(CI) = (mean + or - t×sd/√n)

CI = (5 + 2.306×3/√8) = 5 + 6.918/2.828= 5+2.45=7.45°F

CI = (5 - 2.306×3/√8) = 5-2.45 = 2.55°F

Z = (sample mean - population mean)/(sd÷√n) = (5-2.55)/(3÷√8) = 2.45/1.061 = 2.31

Step 3

Using the standard distribution table, the cumulative area to the left of Z = 2.31 is 0.9896

P-value = 1 - 0.9896 = 0.0104

Step 4

Conclusion: A 95% confidence interval for the true mean minimum temperature that will damage an iPod is between 2.55°F and 7.45°F

7 0
3 years ago
Which error did Kevin make?
Len [333]

Answer: A

(He has the side lengths in the wrong place in the cosine ratio)

6 0
3 years ago
Read 2 more answers
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