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3 years ago

WILL GIVE A BRAINLEST FOR RIGHT ANSWER !!!

Mathematics

2 answers:

svlad2 [7]3 years ago

4 0

Answer: Cluster sampling

Step-by-step explanation:

Cluster sampling is a type of sampling method . With cluster sampling, the observer splits the population into separate groups which are called as called clusters. After dividing the whole populations into clusters he select a simple random sample of clusters from the population. The observer conducts his analysis on data from the sampled clusters.

From the given statement we can see that the automobile is doing his analysis by selecting three stores from each state (cluster) in the country and surveys all customers present in the store in a certain week.

Hence, he used cluster sampling .

galben [10]3 years ago

3 0

Answer:

Its stratified

Step-by-step explanation:

i got it right on the test and the one below is wrong

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The cost of a cheese pizza is $9.99 plus $0.35 for each additional topping, t.

Shkiper50 [21]

Answer:

Step-by-step explanation:

Create an equation 9.99+0.35t≤12

solve for t

6 0

3 years ago

When visiting his parents, Tyler drives at an average speed of 42 km/h through urban areas and at an average speed of 105 km/h o

MaRussiya [10]

Answer:

168 km

Step-by-step explanation:

Let x represent the distance Tyler drives at the slower speed, and let y represent the distance at the higher speed. Using time = distance/speed, we can write equations for the total travel time:

x/42 +y/105 = 2.5

x/28 +y/60 = 4.0 . . . . . 1.5 hours more than the usual 2.5 hours

Multiplying the first equation by 210, we have ...

5x +2y = 525

Multiplying the second equation by 420, we get ...

15x +7y = 1680

Subtracting 3 times the first of these equations from the second, we have ...

(15x +7y) -3(5x +2y) = (1680) -3(525)

y = 105

Putting this into the very first equation, we get ...

x/42 + 105/105 = 2.5

x/42 = 1.5 . . . . . . subtract 1

x = 63 . . . . . . . . .multiply by 42.

The total distance to Tyler's parents' house is ...

63 km + 105 km = 168 km

4 0

3 years ago

The ratio of boys to girls on rowans swim team is 2:3.if there are 40 total swimmers on the team,how many of them are girls?

Bogdan [553]

Answer:

The ratio of girls is 24.

Step-by-step explanation:

If the total amount of swimmers is 40, you can divide it by 8 to get 5 multiples. If three of those 5's belong to the ratio of girls, the equation is 3 x 8. The answer is 24.

6 0

3 years ago

if it takes 3 cups of sugar and 4 1/2 cups of flour for the recipe how many cups of flour for 4 cups of sugar

Vitek1552 [10]

Answer:6 cups

Step-by-step explanation:

3/4.5=4/x

Cross product

3x=18

X=18/3

X=6

8 0

3 years ago

Use the Distributive Property to rewrite the expression. 9(y + 4)

Ulleksa [173]

Answer:

Answer would be 9y+36

Step-by-step explanation:

Because if you distribute the 9 inside the parenthesis, you'd get

9*y=9y and 9*4=36

so 9y+36

Hope my answer was helpful to you!

7 0

4 years ago