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lbvjy [14]
3 years ago
13

Combine like terms to find the expression

Mathematics
1 answer:
Scrat [10]3 years ago
6 0

Answer:

2.1

Step-by-step explanation:

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If wheel A rotates with constant angular velocity
Tomtit [17]

Answer:

Step-by-step explanation:

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7 0
3 years ago
A circular labyrinth has a circumference of 75 ft. What is the distance from the outside edge of the labyrinth to its center? Us
vazorg [7]
C=2πr
75=2 (3.14) (r)
75 = (6.28) (r)
r= 11.942675
rounded to the nearest foot is 12.
8 0
3 years ago
A phone manufacturer wants to compete in the touch screen phone market. He understands that the lead product has a battery life
Tasya [4]

Answer:

(a) <em>H₀</em>: <em>μ</em> ≤ 10. vs. <em>Hₐ</em>: <em>μ</em> > 10.

(b) The test statistic value is 1.86.

(c) The critical value to test the phone manufacturer's claim is 1.301.

(d) The battery life of the new touch screen phone is not more than 10 hours.

Step-by-step explanation:

In this case we need to determine the significance of the claim made by the phone manufacturer, that the battery life of the new touch screen phone is more than twice as long as that of the leading product.

The information provided is:

\bar x=10.5\\s=1.8\\n=45

(a)

The hypothesis can be defined as follows:

<em>H₀</em>: The battery life of the new touch screen phone is not more than 10 hours, i.e. <em>μ</em> ≤ 10.

<em>Hₐ</em>: The battery life of the new touch screen phone is more than 10 hours, i.e. <em>μ</em> > 10.

(b)

As the population standard deviation is not provided, we will use a <em>t</em>-test for single mean.

Compute the test statistic value as follows:

 t=\frac{\bar x-\mu}{s/\sqrt{n}}=\frac{10.5-10}{1.8/\sqrt{45}}=1.86

The test statistic value is 1.86.

(c)

The significance level of the test is, <em>α</em> = 0.10.

The degrees of freedom will be:

df=n-1=45-1=44

Compute the critical value as follows:

t_{0.10, 44}=1.301

*Use a <em>t</em>-table for the value.

Thus, the critical value to test the phone manufacturer's claim is 1.301.

(d)

Decision rule:

If the test statistic value is less than the critical value then the null hypothesis will be rejected and vice-versa.

 t = 1.86 > t₀.₁₀, ₄₄ = 1.30

The calculated <em>t</em>-value of the test is more than the critical value.

The null hypothesis will not be rejected.

Thus, it can be concluded that the battery life of the new touch screen phone is not more than 10 hours.

6 0
3 years ago
I need help with this pleasee
Sauron [17]

Answer:

120

Step-by-step explanation:

The area of the room is 300 feet^2

The carpet has a side length of 2.5 feet so you divide 300 by 2.5

300/2.5 = 120

3 0
3 years ago
Write 7.5^{1.25} as a radical
Paul [167]

Answer:

sushi and the cousin that pushed it back to you are you answering my phone calls for you to come over and watch the game Player Wins the answer is Abiotic the answer is Abiotic the answer is Abiotic the answer is Abiotic the answer is Abiotic the answer is Abiotic the beginning and only one the answer is that a museum the answer to play with you and I will vanish the same time I don't think so epic in a bit if you edited it and

Step-by-step explanation:

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5 0
2 years ago
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