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3 years ago

The price of a plane ticket has increased from $150 to $200. By what percent has the price increased?

2 answers:

4 0

There is a formula to figure out questions like this:

The price difference/ the original price and times the whole equation by 100 (to get the percentage).

> ($50/$150) x 100 = 33% (rounded)

White raven [17]3 years ago

4 0

Answer:

The answer is the option C

$33\%$

Step-by-step explanation:

we know that

$\$150$ ------> represent the $100\%$

by proportion

Find what percent has the price increased

$\frac{100}{150}\frac{\%}{\$}=\frac{x}{200-150}\frac{\%}{\$} \\ \\x=(200-150)*100/150\\ \\x=50*100/150\\ \\x=33.33\%$

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3 years ago

The common difference in an arithmetic sequence is –2 and the first term is 47. What is the 29th term?

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An arithmetic sequence is an ordered list of numbers where the next number is found by adding on to the last number (ex: 2,5,8,11... is a sequence where 3 is added on to find the next number).

The equation for an arithmetic sequence is
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$A_{n}$ is the "n-th" number in the sequence (ex: is the first term in the sequence)
d is the number you add (common difference) to find the next number
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d=-2 because the question gives you that

$A_{n}=A_{1}+(n-1)d$
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The answer is C. 158

For the second one, it gives you $A_{1}=4$ and $A_{}=18$
You can use this to find d

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Now you can just solve using the equation normally.
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3 years ago

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3 years ago

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disa [49]

Answer:

The 90 % confidence limits are (-2.09, 8.09).

Since the calculated values do not lie in the critical region we accept our null hypothesis.

Step-by-step explanation:

The null and alternative hypothesis are given by

H0: σ₁²= σ₂² against Ha: σ₁² ≠ σ₂²

Confidence interval for the population mean difference is given by

(x`1- x`2) ± t √S²(1/n1 + 1/n2)

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Now putting the values in the t- test

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