Need help on 2,3, and 4 please

Mathematics

2 answers:

Romashka-Z-Leto [24]3 years ago

5 0

2)x-(-24)=49
x+24=49
x=49-24
x=25
3)-22=3+a
-22-3=a
-25=a
a=-25
4)-46=-20-x
x=-20+46
x=26

larisa86 [58]3 years ago

5 0

Hi , for the second one the answer is 25
x - [-24] equals 49
We have to change the subtraction sign to an addition sign and the number -24 to its opposite .
25+24 equals 49
For the third one the answer is -25 because 3 plus -25 equals to -22.
For the fourth one the answer is 26
we change the sign to an addition sign and the number 26 to its opposite , the we just add .

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Both the sample can be used to make inferences about the population.

Given that,

Jason and Yolanda both drew a simple random sample from a non-normally distributed population of 25,000.

Jason’s sample consisted of 0.24% of the population, while Yolanda’s sample consisted of 0.32% of the population.

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According to the question,

Total number of population = 25000

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$=\dfrac{ Sample \ of \ population \ in \ percentage}{100} \times {Total \ number \ of \ population}\\\\= \dfrac{0.24}{100} \times 25,000\\\\= 0.24 \times 250\\\\= 60$

And the number of the population according to Yolanda's sample is given by,

$=\dfrac{ Sample \ of \ population \ in \ percentage}{100} \times {Total \ number \ of \ population}\\\\= \dfrac{0.32}{100} \times 25,000\\\\= 0.24 \times 250\\\\= 80$