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2 years ago

Rational Functions

Mathematics

1 answer:

kramer2 years ago

6 0

Answer:

Step-by-step explanation:

Remark

I suppose the question is what is Thaddeus' time to make the trip. This is a fairly common question but not everyone knows how to solve it.

Derivation of the Formula

Prescott + Thaddeus = 1 trip

So the logic of the equation is this.

distance = 1 trip

time = number of dates

rate = ?

rate = distance / time

To find out what the contribution of Thaddeus is set up a distance time formula.

1/21 days is the rate for Prescott

1/x days is the rate for Thaddeus

Together the rate is 1/9

Solution

1/21 + 1/x = 1/9

Subtract 1/21 from both sides

1/x = 1/9 - 1/21

It's not obvious what the LCM is.

9 = 3 * 3

21 = 3 * 7

LCM: 7 * 3 *3 = 63

1/x = 7/63 - 3/63 = 4/63

1/x = 4/63 Cross Multiply

4x = 63 Divide by 4

x = 63/4

Answer

x = 15 3/4

x = 15.75

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How do you factor the expression<br> 20k+50

Aliun [14]

Answer is 10(2k+5)

-----------------------------------

Work Shown:

20k+50 = 10*2k + 10*5
20k+50 = 10(2k+5)

Note how we can distribute the 10 back in to check our work
10(2k+5) = 10(2k)+10(5) = 20k+50
so that confirms we have the right answer

Another thing to notice is that 10 is the largest factor that we can pull out of 20k and 50. The value 10 is the GCF (greatest common factor) of 20 and 50.

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3 years ago

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A software company decided to conduct a survey on customer satisfaction. Out of 564 customers who participated in the online sur

nikklg [1K]

Answer:

$z=\frac{0.0904 -0.1}{\sqrt{\frac{0.1(1-0.1)}{564}}}=-0.760 \approx -0.8$

$p_v =2*P(z$

Step-by-step explanation:

Information given

n=564 represent the sample selected

X=51 represent the number of people who rated the overall services as poor

$\hat p=\frac{51}{564}=0.0904$ estimated proportion of people who rated the overall services as poor

$p_o=0.1$ is the value to compare

z would represent the statistic

Hypothsis to analyze

We want to analyze if the proportion of customers who would rate the overall car rental services as poor is 0.1, so then the system of hypothesis are:

Null hypothesis: $p=0.1$