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serious [3.7K]
3 years ago
15

A marketing firm for Cobra Auto Security Systems mailed out a survey to 35% of the households in New York City, Washington DC, a

nd Chicago to determine the market for auto security systems. According to the respondents of the survey, 55% of the population uses public transportation and does not own an automobile. So, the marketing firm concluded that 55% of all Americans use public transportation and do not own an automobile. Which of the following statements is correct?
A. This method of sampling is neither biased nor unbiased.

B. This method of sampling can be considered both biased and unbiased.

C. This method of sampling is biased.

D. This method of sampling is unbiased.
Mathematics
1 answer:
san4es73 [151]3 years ago
7 0
Your answer would be B.
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Help please!! Picture below.
saul85 [17]
X+ y <span>≥ </span>12
2.75x +3.50y < 35

Hope this helps
7 0
2 years ago
216 divided by 31
Aleksandr-060686 [28]

Answer:

6 r 30

Step-by-step explanation:

Step 1:

Start by setting it up with the divisor 31 on the left side and the dividend 216 on the right side like this:

             

 3 1 ⟌ 2 1 6

Step 2:

The divisor (31) goes into the first digit of the dividend (2), 0 time(s). Therefore, put 0 on top:

       0    

 3 1 ⟌ 2 1 6

Step 3:

Multiply the divisor by the result in the previous step (31 x 0 = 0) and write that answer below the dividend.

       0    

 3 1 ⟌ 2 1 6

      0    

Step 4:

Subtract the result in the previous step from the first digit of the dividend (2 - 0 = 2) and write the answer below.

       0    

 3 1 ⟌ 2 1 6

     - 0    

       2    

Step 5:

Move down the 2nd digit of the dividend (1) like this:

       0    

 3 1 ⟌ 2 1 6

     - 0    

       2 1  

Step 6:

The divisor (31) goes into the bottom number (21), 0 time(s). Therefore, put 0 on top:

       0 0  

 3 1 ⟌ 2 1 6

     - 0    

       2 1  

Step 7:

Multiply the divisor by the result in the previous step (31 x 0 = 0) and write that answer at the bottom:

       0 0  

 3 1 ⟌ 2 1 6

     - 0    

       2 1  

         0  

Step 8:

Subtract the result in the previous step from the number written above it. (21 - 0 = 21) and write the answer at the bottom.

       0 0  

 3 1 ⟌ 2 1 6

     - 0    

       2 1  

     -   0  

       2 1  

Step 9:

Move down the last digit of the dividend (6) like this:

       0 0  

 3 1 ⟌ 2 1 6

     - 0    

       2 1  

     -   0  

       2 1 6

Step 10:

The divisor (31) goes into the bottom number (216), 6 time(s). Therefore put 6 on top:

       0 0 6

 3 1 ⟌ 2 1 6

     - 0    

       2 1  

     -   0  

       2 1 6

Step 11:

Multiply the divisor by the result in the previous step (31 x 6 = 186) and write the answer at the bottom:

       0 0 6

 3 1 ⟌ 2 1 6

     - 0    

       2 1  

     -   0  

       2 1 6

       1 8 6

Step 12:

Subtract the result in the previous step from the number written above it. (216 - 186 = 30) and write the answer at the bottom.

       0 0 6

 3 1 ⟌ 2 1 6

     - 0    

       2 1  

     -   0  

       2 1 6

     - 1 8 6

         3 0

You are done, because there are no more digits to move down from the dividend.

The answer is the top number and the remainder is the bottom number.

Therefore, the answer to 216 divided by 31 calculated using Long Division is:

6

30 Remainder

8 0
2 years ago
What is the classification of a right angle?
Helen [10]
A right angle is an angle with a measure of 90 degrees.
8 0
3 years ago
Read 2 more answers
Which model best fits this set of data?
Jobisdone [24]

we are given points as

(-2,-4)

(0,2)

(1,5)

we can points

and then we can join them

After that we can get idea about it's shape

we can see that

this is straight line

so, this is linear model

Hence, option-C................Answer

7 0
2 years ago
–5x3y3 + 8x4y2 – xy5 – 2x2y4 + 8x6 + 3x2y4 – 6xy5 standard form
I am Lyosha [343]

Answer:

probably 8x6+8x4y2−5x3y3+x2y4−7xy5

Step-by-step explanation:

mathpapa lol idk i jus need points

4 0
3 years ago
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