2 years ago

What is the answer 1/7+3/7=?

Mathematics

2 answers:

tatyana61 [14]2 years ago

5 0

1/7+3/7=>(3+1)/7=4/7

hodyreva [135]2 years ago

4 0

Just add the numerators
1/7+3/7=4/7

answer=4/7
hope this helps......

You might be interested in

A line with a negative slope intersects a horizontal line 3 units above the x-axis. Select each point that can not be the inters

Ainat [17]

It can’t not be (-2,3) or (-3,5) or (0,-3)

6 0

2 years ago

Read 2 more answers

What is the volume of this shape?

Stells [14]

Answer:

Step-by-step explanation:

3 x 3 x 4 =

9 x 4 =

6 0

2 years ago

Read 2 more answers

Mika can eat 212121 hot dogs in 666 minutes. She wants to know how many minutes (m)(m)left parenthesis, m, right parenthesis it

Makovka662 [10]

1110 minutes it would take her to eat that many hot dogs...and man is she a fast eater.

7 0

3 years ago

Read 2 more answers

3. Martin's car had 86,456 miles on it. Of that distance, Martin's wife drove 24,901

Jet001 [13]

Answer:

Martin Drove about 60,000

Martin Drove exactly 53,558

Step-by-step explanation:

90,000 - (20,000 +10,000) = x

60,000 = x

86,456 - (24,901 - 7,997) = x

53,558 = x

8 0

3 years ago

Assume we need to estimate the mean of a normally-distributed population with great accuracy. Specifically, for significance lev

bulgar [2K]

Answer:

$n = 2662.56\sigma^2$

Step-by-step explanation:

We are given the following in the question:

Significance level = 0.01

Width of interval = 0.1

Population variance = $\sigma^2$

We have to find the sample size so that the width of the confidence interval is no larger than 0.1

$z_{critical}\text{ at}~\alpha_{0.01} = \pm 2.58$

Formula for sample size:

$n = \displaystyle\frac{z^2\sigma^2}{E^2}$

where E is the margin of error. Since the confidence interval width is 0.1,

$E = 0.05$

Putting these values in the equation:

$n = \displaystyle\frac{(2.58)^2\sigma^2}{(0.05)^2} = 2662.56\sigma^2$

So, the above expression helps us to calculate the sample size so that the width of the confidence interval is no larger than 0.1 for different sample variances.

4 0

3 years ago