All categories

3 years ago

-1/13-10/39 please solve for me I dont seem to get it

Mathematics

1 answer:

natima [27]3 years ago

5 0

Answer:

$\frac{-1}{3}$

Step-by-step explanation:

$\frac{-1}{13} - \frac{10}{39}$

Find common denominator for 13 and 39

common denominator is 39

rewrite fractions so they have the same denominator

$\frac{-1}{13} = \frac{-3}{39}$

add them up

$\frac{-3}{39} + \frac{-10}{39} = \frac{-13}{39}$

simplify/ put in the lowest terms

$\frac{-1}{3}$

You might be interested in

List the factors to find the greatest common factor of 24 and 66

Nadya [2.5K]

The greatest common factor between these 2 numbers is 6

5 0

3 years ago

Read 2 more answers

A dietitian wants to know the average time spent on breakfast in a primary school. The dietitian randomly samples 25 students an

blsea [12.9K]

Answer:

The right options are:

a. The margin of error is 0.632

f. There is a 95% chance that the true mean is between 11.968 and 13.232 minutes.

Step-by-step explanation:

The question is incomplete:

Select one or more:

a. The margin of error is 0.632

b. The margin of error is 1264.

C. The margin of error is 0.600.

d. We believe that the true mean time spent on breakfast is between 11.968 and 13.232 minutes.

e. If we take many other samples from this population, 95% of them will have a sample mean that is between 11968 and 13232.

f. There is a 95% chance that the true mean is between 11.968 and 13.232 minutes.

The margin of error can be calculated from the bounds of the confidence interval as:

$E=\dfrac{UL-LL}{2}=\dfrac{13.232-11.968}{2}=\dfrac{1.264}{2}=0.632$

As the confidence interval is calculated at 95% confidence, we are 95% confident that the true mean is within the calculated interval. We are not 100% confident although (that's why Option d is false).

This interval does not give us information about the sampling distribution (option e is false).

8 0

3 years ago

Parallel line to 2x+3y=6 passing through (6,-3)

MissTica

Answer:

y = (-2/3)x + 1

Step-by-step explanation:

3y = -2x + 6

y = (-2/3)x + 2

y + 3 = (-2/3)(x - 6)

y + 3 = (-2/3)x + 4

y = (-2/3)x + 1

3 0

3 years ago

Please help me find the answer, i will friend you

snow_lady [41]

Ok so what you need to do is first find the area of the circle using π r^2. So π12^2 or π144= 452.389342117 This is the area of the whole circle. To find the area of the sector you have to multiply the total area by 172/360 or 0.47777777777 This will get you 216.141574567 round as necessary but your answer is 216.141574567units^2

6 0

3 years ago

If we reject the null hypothesis, does this mean that we have proved it to be false beyond all doubt? Explain your answer.a. Yes

crimeas [40]

Answer:

Yes, the test was conducted with a risk of a type I error.

Step-by-step explanation:

If we reject the null hypothesis, does this mean that we have proved it to be false beyond all doubt? Explain your answer.

Yes, for a null hypothesis to be rejected, it has being proven beyond all doubt that the null hypothesis will not work. the normal distribution has being used for the probability calculation.

if the null hypothesis is rejected and the alternative hypothesis is accepted, a type I error as occur.

In general terms:

‘a hypothesis has been rejected when it should have been accepted’. When this occurs, it is called a type I error.

5 0

3 years ago