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anzhelika [568]
3 years ago
10

Lin is 7 years younger than Adrian,

Mathematics
1 answer:
jeka943 years ago
5 0

Answer: Age of Lin is 12

Solution:

Let X= age of Maya

(X/2)+4= age of Adrian

((X/2)+4)-7= age of Lin

X+(X/2)+4+((X/2)+4-7)=61

X+.5X+4+.5X+4-7=61

2X+4+4-7=61

2x=61-8+7

2X=60

X=30 age of Maya

19= age of Adrian

Age of Lin is

=((X/2)+4)-7

=15+4-7

=12

To check if this is correct

<span>30+19+12=61</span>

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Answer:

<u>y=5x+7</u>

<u>or</u>

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Step-by-step explanation:

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Steps:

(1, 12) (2, 17)                          formula: y2-y1 / x2-x1 = m

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Which of the following is an advantage of using systematic random sampling?
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Samples may be classified as:

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Stratified: Also divides the population into groups. However, then only some elements of the group are surveyed.

Systematic:

One of the bigger advantages is that the systematic sampling eliminate clusters, which means that the last option is wrong.

Inadvertently missing patterns is a problem in systematic sampling, and not an advantage, thus the third option is also wrong.

It also does not reduce sampling variability, thus the first option is wrong.

From this, it can be concluded that the correct option is:

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The ratio of men to women working for a company is 3 to 5 . if there are 140 women working for the company, what is the total nu
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