Please help, Factored form

A length of rope is stretched between the top edge of a building and a stake in the ground. The rope also touches a tree halfway

mestny [16]

the tree is 8 ft because it is half of the building

3 0

2 years ago

suppose a point is translated repeatedly up 2 units and right 1 unit. does the point remain on a straight line as it is translat

Anna [14]

Yes the point does remain on a straight line

6 0

3 years ago

Solve 5.6-13/8-3.9+2 3/4

AlekseyPX

Answer:

65

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

How much time required to complete a10days work if it could complete by 3 worker in 4days and 6worker in 3.05 days,if 5 workers

Andrei [34K]

Answer:

This seems to be a linear relationship:

A linear relationship can be written as:

y = a*x + b

where a is the slope and b is the y-axis intercept.

For a line that passes through the points (x1, y1) and (x2, y2), the slope can be written as:

a = (y2 - y1)/(x2 - x1).

We know that 3 workers can complete the job in 4 days.

Then if we define W as the rate at which a single worker can complete the work, we have the ordered pair (3 workes, 4 days)

And we also know that 6 workers can finish the job in 3.05 days, then we also have the ordered pair (6 workers, 3.05 days)

Then using these two, we can find the slope of the line:

a = (3.05 days - 4 days)/(6 workers - 3 workers) = -0.35 days/worker.

Then we have the equation:

y = (-0.35 days/worker)*x + b

Where:

y represents the time to complete the job

x represents the number of workers.

b is the y-intercept, to find the value, we could just replace one of the points in the equation, for example with the point (3 workes, 4 days) we need to replace x by 3 workers, and y by 4 days:

4 days = (-0.35 days/worker)*3 workers + b

4 days = -1.4 days + b

4 days + 1.4 days = 5.4 days = b

then the equation is:

y = (-0.35 days/workers)*x + 5.4 days.

Now we can find the number of days needed for 5 workers to finish the job, we just need to replace x by 5 workers:

y = (-0.35 days/workers)*5 workers + 5.4 days

y = 3.65 days.

4 0

2 years ago

Note that the proportion of students who went Home for winter break was 0.35 (or 35%). Briefly explain why it would not be appro

tensa zangetsu [6.8K]

Answer:

Is not appropiate to refer a estimation or a statistic as a paramter because the statistic just give informaation about the sample selected and not about all the population of interest. What we can do is inference with this sample proportion or confidence intervals in order to see on what limits our real parameter of interest p lies.

Step-by-step explanation:

Description in words of the parameter p

$p$ represent the real population proportion of students who went Home for winter break

$\hat p$ represent the estimated proportion of students who went Home for winter break

n is the sample size selected

The population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{p(1-p)}{n}})$

Solution to the problem

For this case we assume that the proportion given 0.35 is an estimation for the real parameter of interest p, that means $\hat p = 0.35$

On this case the estimated proportion is calculated from the following formula:

$\hat p = \frac{X}{n}$

Where X are the people in the sam with the characteristic desired (students who went Home for winter break) and n the sample size selected.

Is not appropiate to refer a estimation or a statistic as a paramter because the statistic just give informaation about the sample selected and not about all the population of interest. What we can do is inference with this sample proportion or confidence intervals in order to see on what limits our real parameter of interest p lies.

7 0

3 years ago