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olga55 [171]
2 years ago
7

Simplifyanswer itb)​

Mathematics
2 answers:
exis [7]2 years ago
3 0

Answer:

a) 8x + 5x = 13x

b) 9f + 10f - 12f = 7f

Step-by-step explanation:

For part b, just solve from left to right normally, since adding and subtracting are inverse operations. (Inverse operation; meaning they are opposites of each other.)

So 9 + 10 = 19, and 19 - 12 = 7.

Hope this helps you :)

Artist 52 [7]2 years ago
3 0

Step-by-step explanation:

(a) 8x + 5x = 13x....simplified

(b) 9f + 10f - 12f = 7f.....simplified

<h3>Hope it helps you! </h3>

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A simple random sample of size n equals 200 individuals who are currently employed is asked if they work at home at least once p
____ [38]

Answer: 99% of confidence interval for the population proportion of employed individuals who work at home at-least once per week

//0.20113,0.20887[/tex]

Step-by-step explanation:

<u>step 1:-</u>

Given sample  size n=200

of the 200 employed individuals surveyed 41 responded that they did work at home at least once per week

 Population proportion of employed individuals who work at home at least once per week  P = \frac{x}{n} =\frac{41}{200} =0.205

Q=1-P= 1-0.205 = 0.705

<u>step 2:-</u>

Now  \sqrt{\frac{P Q}{n} } =\sqrt{\frac{(0.205)(0.705)}{200} }

=0.0015

<u>step 3:-</u>

<u>Confidence intervals</u>

<u>using formula</u>

(P  -  Z_∝} \sqrt{\frac{P Q}{n},} (P  +  Z_∝} \sqrt{\frac{P Q}{n},

(0.205-2.58(0.0015),0.205+2.58(0.0015)\\0.20113,0.20887

=0.20113,0.20887[/tex]

<u>conclusion:</u>-

99% of confidence interval for the population proportion of employed individuals who work at home at-least once per week

//0.20113,0.20887[/tex]

4 0
3 years ago
The number of men and women participating in the Winter Olympic Games has been steadily increasing in recent years. In the 19th
Montano1993 [528]

Using a system of equations, it is found that the correct option is:

A) 1389x+1660y=787x+1121y.

<h3>What is a system of equations?</h3>

A system of equations is when two or more variables are related, and equations are built to find the values of each variable.

In this problem, considering the amounts in each olympics(1389 men and 787 women participated on the 19th, 1660 men and 1121 women in the 22th), the system is:

A) 1389x+1660y=787x+1121y.

More can be learned about a system of equations at brainly.com/question/24342899

6 0
2 years ago
When would you use a negative number to describe a real world amount? Give an example
Dvinal [7]
When owe the bank some money or some friends so it could be -1.7h+19.7=187
8 0
3 years ago
Help
Natali5045456 [20]

Answer:

1.9 \sqrt{3}

Step-by-step explanation:

3.8 is 2x 3.8/2 is 1.9

5 0
2 years ago
2ab + 4 = d solve for a
Anestetic [448]

Answer:

a = d/2b - 2/b

Step-by-step explanation:

2ab+4=d

2ab=d-4

a= d/2b - 4/2b

<h2>a = d/2b - 2/b</h2>
8 0
2 years ago
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