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garri49 [273]
3 years ago
7

Sanjay and Felipe are putting together a 500-piece puzzle. Sanjay could do the entire puzzle by himself in 6 hours, while it wou

ld take Felipe 8 hours to do the puzzle alone.
Use the table to write and solve an equation to determine the approximate amount of time it would take Sanjay and Felipe to do the puzzle if they were working together.

0.8 hours
1.7 hours
3.4 hours
7 hours
Mathematics
2 answers:
kicyunya [14]3 years ago
7 0
3.4 hours. The efficiency of a worker is the amount of work divided by time needed. The efficiency of Sanjay alone is 500/6, and the efficiency of Felipe alone is 500/8. When they work together, their combined efficiency is 500/6+500/8=3500/24. Therefore, they need 500/(3500/24)=24/7=3.4 hours.
Rina8888 [55]3 years ago
5 0
The answer would be

<span>3.4 hours
</span>
pls mark brainliest XD
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7/8
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8 0
3 years ago
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A professor believes the students in a statistics class this term are more creative than most other students attending the unive
djverab [1.8K]

Answer:

Correct option: B

Step-by-step explanation:

The professor can perform a One-mean <em>t</em>-test to determine whether the average score of the students in his class is more than the average score of all the students attending university.

A <em>t</em>-test will be used instead of the <em>z</em>-test because the population standard deviation is not provided instead it is estimated by the sample standard deviation.

The hypothesis for this test can be defined as follows:

<em>H₀</em>: The average score of the students in his class is not more then the entire university, i.e. <em>μ ≤ 35</em>.

<em>Hₐ</em>: The average score of the students in his class is more then the entire university, i.e. <em>μ > 35</em>.

Given:

\bar x=40\\SE_{\bar x}=1.63

The test statistic is:

t=\frac{\bar x-\mu}{SE_{\bar x}}=\frac{40-35}{1.63}=3.0674\approx3.07

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4 0
2 years ago
What would my answer be?
Svetllana [295]
Since triangle is isosceles, that means that unknown angles are equal. 180-72=108
108:2=54
So you’re answer would be: 54 degrees.
4 0
2 years ago
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vagabundo [1.1K]
For uniform, the mean is:

<span>x¯ = (<span>590.0+590.9) 2</span></span>
The variance is:<span>
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</span></span><span> Where n=10.

The answer would be 590.45


I hope my answer has come to your help. Have a nice day ahead and may God bless you always!</span>
8 0
3 years ago
Find the greatest common factor of 30 and 105.
Amanda [17]
15 because it can go in to 30 to equal 2 and 105 to equal 7
8 0
3 years ago
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