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Lubov Fominskaja [6]
2 years ago
5

An airplane travels at an average speed of 250 mph for 3 hours.

Mathematics
2 answers:
expeople1 [14]2 years ago
4 0
250 × 3 = 750

D. 750

And i think i have already answered this one before..
Sveta_85 [38]2 years ago
4 0
250 × 3 = 750
the answer is D)750
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How much vanilla extract will be needed to make 2 dozen cookies? Show your work.
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Answer: the answer is 2 teaspoons of vanilla extract.

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3 years ago
PLEASE HELP ILL MAKE YOU THE BRAINIEST <br> Find the value of x
Firdavs [7]

Answer:

12.04

Step-by-step explanation:

add 8 and 9 by the power of two: 8^2+9^2

that equals to 145

find the square root of 145 and that equals to 12.04

4 0
1 year ago
If g(x)= -3x+10, what is g(-5)?
Vikentia [17]

Answer:

g(-5) = -5

Step-by-step explanation:

You replace x with -5.

-3(-5) + 10 = -15

-15 + 10 = -5

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5 0
2 years ago
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A researcher conducted an experiment to investigate the effectiveness of a medicated lotion in treating a skin irritation. A gro
Helga [31]

Answer:

It can be concluded that the medicated lotion has an effect on treating skin irritations.

Step-by-step explanation:

In this case we need to determine whether the medicated lotion was effective in treating the skin irritation or not.

The hypothesis can be defined as follows:  

<em>H₀</em>: There is no difference between the two proportions, i.e. <em>p</em>₁ - <em>p</em>₂ = 0.  

<em>Hₐ</em>: There is a significant difference between the two proportions, i.e. <em>p</em>₁ - <em>p</em>₂ ≠ 0.  

The information provided is:

n₁ = 40

n₂ = 40

X₁ = 36

X₂ = 16

Compute the sample proportions and total proportions as follows:

 \hat p_{1}=\frac{36}{40}=0.90\\\\\hat p_{2}=\frac{16}{40}=0.40\\\\\hat P=\frac{X_{1}+X_{2}}{n_{1}+n_{2}}=\frac{36+16}{40+40}=0.65

Compute the test statistic value as follows:

 z=\frac{\hat p_{1}-\hat p_{2}}{\sqrt{\hat P(1-\hat P)[\frac{1}{n_{1}}+\frac{1}{n_{2}}]}}=\frac{0.90-0.40}{\sqrt{0.65(1-0.65)[\frac{1}{40}+\frac{1}{40}]}}=4.69

The test statistic value is 4.69.

The decision rule is:

The null hypothesis will be rejected if the <em>p</em>-value of the test is less than the significance level.

Compute the <em>p</em>-value as follows:

 p-value=2\times P(Z

The <em>p</em>-value of the test is very small.

The null hypothesis will be rejected at any significance level.

Thus, there is a significant difference between the two proportions.

So, it can be concluded that the medicated lotion has an effect on treating skin irritations.

6 0
3 years ago
Given that T is squidistant from U and S find x
Temka [501]
Found the figure:TU = 7TS = x - 1Since T is equidistant from u and s, this means that TU = TS7 = x - 17 + 1 = x8 = xThe  ...
3 0
3 years ago
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