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2 years ago

In 25 minutes, Jay can run 10 laps around the track. Write an equation to represent the relationship.

1 answer:

5 0

Hi there!

Remember that speed=distance/time
Let s be the speed in laps per minute
Therefore, we can say that s=10/25
We could also say that 25s=10, or 25=10/s
Hope this helps!

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A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only

makvit [3.9K]

Answer:

The sample size is $n = 3139$

Step-by-step explanation:

From the question we are told that

The margin of error is $E = 0.02$

From the question we are told the confidence level is 97.5% , hence the level of significance is

$\alpha = (100 - 97.5% ) \%$

=> $\alpha = 0.025$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 2.241$

Generally we will assume the sample proportion to be $\^ p = 0.5$

Generally the sample size is mathematically represented as

$n = [\frac{Z_{\frac{\alpha }{2} }}{E} ]^2 * \^ p (1 - \^ p )$

=> $n = [\frac{2.241}{0.02} ]^2 *0.5 (1 - 0.5 )$

=> $n = 3139$

7 0

2 years ago

Solve y = mx + b for x

eimsori [14]

Y=mx+b
-b -b
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-by= mx
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m m

-by
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m

8 0

3 years ago

you buy a Lily and an African Violet on the same day you were instructed to water the Lily every 4th day and water The Violet ev

nexus9112 [7]

The Least Common Multiple (LCM) will calculate when they are watered on the same day.

LCM of 4 and 7 is 28.

Answer: They will be watered together every 28 days.

3 0

3 years ago

Rita is starting a running program. the table shows the total number of miles she runs in different weeks. what is the equation

Stolb23 [73]

Based on the table, the equation of the line of best fit to the nearest thousandths is equal to y = 1.671x + 4.699.

<h3>How to determine the equation of the line of best fit?</h3>

Mathematically, the equation of the line of best fit is calculated by using this formula:

y = mx + c

<u>Where:</u>

m is the slope.

c is the intercept.

Based on the table, the slope and intercept to the nearest thousandths are equal to 1.671 and 4.699 respectively.

Therefore, the equation of the line of best fit is equal to y = 1.671x + 4.699.

Read more on line of best fit here: brainly.com/question/4674926

#SPJ4

7 0

2 years ago

Read 2 more answers

Find the length of the third side. If necessary, round to the nearest tenth. 25 20

Komok [63]

Answer:

Step-by-step explanation:

$using \: pythagoras \: theorem \\ let \: the \: unknown \: side = x \\ 25 {}^{2} = x {}^{2} + 20 {}^{2} \\ 625 = x {}^{2} + 400 \\ x {}^{2} = 625 - 400 \\ x {}^{2} { = 225} \\ x = \sqrt{225} \\ x = 15 \\ lenght \: of \: the \: third \: side = 15$

3 0

2 years ago