Anewspaper writer will write an article about the mean age of voters. she will estimate by selecting a sample of voters and calculating their mean age.

which method should the writer use to select the sample?
i need an answer asap explain its urgent
select 100 people who voted for the most popular candidate in the last election

select 100 people who voted in the last election and are more than 30 years old

randomly select 100 people who voted in the last election

randomly select 100 people who read the newspaper

Step-by-step explanation:

Notice that the article is about the mean age of voters, that means they need to have a sample where there's no age restriction, or voter's preference on one candidate.

Basically, they need to randomly selected a certain number of people who just voted in the last election, because their population to write the article is just people who voted, then they will use that data set to find the average age of voters.

Therefore, the right answer is the third choice.

b

step-by-step explanation:

given

- 2 (3x + 12y - 5 - 17x - 16y + 4 )

simplify the parenthesis by collecting like terms

= - 2 (- 14x - 4y - 1) ← distribute the parenthesis by - 2

= 28x + 8y + 2 → b

option 2 is correct.

step-by-step explanation:

we are given two inequality equation

x+y> 5 and -3x+2y< -2

first we draw the graph of both function using t-table method

equation: x+y> 5

for x=0, y=5

for x=-5, y=0

table:

x   :   0     5

y   :   5     0

test point (0,0) , 0> 5

false

equation: -3x+2y< -2

for x=0, y=-1

for x=2, y=4

table:

x   :   0     2

y   : -1       4

test point (0,0) , 0< -2

true

now we draw the graph. see the attachment for graph.

common region would be solution set.

option 2 is correct.