3 years ago

Please help me due tonight

Mathematics

2 answers:

Svetlanka [38]3 years ago

8 0

Answer:

$b.7\frac{2}{30}$

Step-by-step explanation:

$3\frac{2}{5}+3\frac{4}{6}\\=\frac{17}{5} +\frac{22}{6} \\=\frac{17*6}{5*6} +\frac{22*5}{6*5} \\=\frac{102}{30} +\frac{110}{30} \\=\frac{212}{30} \\=7\frac{2}{30}$

Fittoniya [83]3 years ago

4 0

Answer:

7 1/15

Step-by-step explanation:

3 2/5 + 3 4/6 = 7 1/15

You might be interested in

Which fraction is equal to 0.20%?

gtnhenbr [62]

The answer is 20/100.

5 0

3 years ago

Need help please. Need the answer now

cestrela7 [59]

Answer:

Step-by-step explanation:

4 because as shown below. An equilateral triangle has 3 lines of symmetry.

3 0

3 years ago

Read 2 more answers

A college football coach wants to know if there is a correlation between his players leg strength and the time it takes for them

leva [86]

Y=6.89 which is 6.9 to the nearest tenth!

8 0

4 years ago

Find x pls help me this is due soon

seraphim [82]

Answer:

x=35

hope it helps..........

8 0

3 years ago

Determine the minimum sample size required when you want to be 99% confident that the sample mean is within 0.50 units of the po

vfiekz [6]

Answer:

b. 224

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.58$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

In this problem:

We want to find n, when $M = 0.5, \sigma = 2.9$ So

$M = z*\frac{\sigma}{\sqrt{n}}$

$0.5 = 2.58*\frac{2.9}{\sqrt{n}}$

$0.5\sqrt{n} = 7.482$

$\sqrt{n} = 14.964$

$(\sqrt{n})^{2} = (14.964)^{2}$

$n = 223.9$

The nearest integer number to 223.9 is 224.

So the correct answer is:

b. 224

6 0

3 years ago