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Sav [38]
3 years ago
6

Which number line correctly shows 0.8 + 0.3?​

Mathematics
2 answers:
creativ13 [48]3 years ago
8 0
It would be number 2
beks73 [17]3 years ago
4 0

Answer:

2

Step-by-step explanation:

Number 2 because it equals 1.1

It shows how .8 was increased by 3

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Suppose we want a 90% confidence interval for the average amount spent on entertainment (movies, concerts, dates, etc.) by fresh
katovenus [111]

Answer:

609

Step-by-step explanation:

Standard deviation = \sigma = $30

Margin of error = E = $2

Confidence level = 90%

Since the distribution is said to be normal, we will use z scores to solve this problem.

The z score for 90% confidence level = z = 1.645

Sample size= n = ?

The formula to calculate the margin of error is:

E=z\frac{\sigma}{\sqrt{n}}\\\\\sqrt{n}=z\frac{\sigma}{E}\\\\n=(\frac{z\sigma}{E} )^{2}

Using the values in above equation, we get:

n=(\frac{1.645 \times 30}{2} )^{2}\\\\ n = 608.9

This means, the minimum number of observations required is 609

6 0
3 years ago
Help pleaseeeeeeeeee kinda need it fast
tatyana61 [14]

Answer:

X=3

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
I got 12 will someone double check me please? No links I can’t open them
Vedmedyk [2.9K]

Answer:

the first 6⅔

Step-by-step explanation:

in the image

4 0
3 years ago
Factor f(x)=x2−8x+16<br><br> (A) (x−4)2<br> (B) (x+8)2<br> (C) (x−8)2<br> (D) (x+4)2
Fynjy0 [20]

Answer:

A

Step-by-step explanation:

(x-4)^2 = x^2 -4x -4x + (-4)*(-4)

= x^2-8x+16 as required

3 0
2 years ago
How do you do this equation? 9x+(y)i-5=-12+4
Vaselesa [24]
9x+yi-5=-12+4\\\\(9x-5)+yi=-13\iff9x-5=-13\ and\ y=0\\\\9x=-13+5\\9x=-8\\x=-\frac{8}{9}\\\\Answer:x=-\frac{8}{9}\ and\ y=0.
3 0
2 years ago
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