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BaLLatris [955]
3 years ago
13

Please help me s+5s=

Mathematics
2 answers:
AfilCa [17]3 years ago
4 0

Answer:

s+5s=6s

Step-by-step explanation:

not sure if im right but hope this helps

lawyer [7]3 years ago
3 0

Answer:

6s

Step-by-step explanation:

s+5s = 1s + 5s = 6s

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An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an est
nirvana33 [79]

Answer:

The 80% confidence interval for the mean number of words a third grader can read per minute is between 40.4 wpm and 40.8 wpm.

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{1-0.8}{2} = 0.1

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 1-0.1 = 0.99, so z = 1.28

Now, find 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.

M = 1.28*\frac{4.1}{\sqrt{840}} = 0.2

The lower end of the interval is the sample mean subtracted by M. So it is 40.6 - 0.2 = 40.4 words per minute.

The upper end of the interval is the sample mean added to M. So it is 40.6 + 0.2 = 40.8 words per minute.

The 80% confidence interval for the mean number of words a third grader can read per minute is between 40.4 wpm and 40.8 wpm.

3 0
4 years ago
if one tulip one daisy and two mums cost $4.20 and 2 daisies one tulip and one mum costs $3.80 and two tulips and two mums cost
Flura [38]

Answer:

$5.60

Step-by-step explanation:

7 0
3 years ago
Two triangles are shown. The first triangle has sides x, 6 cm, and 12 cm, and the second triangle has corresponding sides 20 cm,
swat32

Answer:

Given the two triangles are shown:

First triangle has sides x cm , 6 cm and 12 cm.

and

Second  triangle has sides 20 cm , 8 cm and 16 cm.

Since, the given two triangles are Similar.

⇒there corresponding sides are in proportion.

i,e

\frac{x}{20}=\frac{6}{8}=\frac{12}{16}

(a)

\frac{x}{20}=\frac{12}{16}

Solve for x;

By cross multiply we have;

16x = 240

Divide both sides by 16 we get;

x = 15 cm

(b)

Find x using the ratio sides:

\frac{6}{8} = \frac{x}{20}

By cross multiply we have;

120 = 8x

Divide both sides by 8 we get;

15 = x

or

x = 15 cm

The value of x =15 cm in both a and b is same because the given two triangles are similar,

by definition of similarity, the given triangles have their corresponding sides are in proportion.

5 0
3 years ago
Hi, I'm actually a good student i do my own work but this stuff makes no sense to me, my teacher isn't the best so if you could
Grace [21]
1. an = 15 (1/3)^(n-1)
because it starts from 1,2,3,4........ for n.
2. a₁= 10(-8)^(1-1)=10
an= 10(-8)^(n-1)
3. an=2(1/3)^(n-1)
4. a₁= 1/2 (4/3)^0=1/2
an= 1/2 (4/3)^(n-1)
Hopes this loves.

3 0
3 years ago
Mr. Walker gave his class the function f(x) = (x + 3)(x + 5). Four students made a claim about the function. Each student’s clai
damaskus [11]

Answer: stephen was correct

Step-by-step explanation:

i just did it now

7 0
3 years ago
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