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Furkat [3]
3 years ago
12

Samantha and Luis are attempting to determine how many library books each seventh grade student checks out at the same time. Sam

antha surveys every other seventh grade student leaving the library. She samples a total of 40 of the 200 seventh graders. Luis samples 30 of the 200 seventh grade students at random in the school cafeteria. Whose sample is the mostrandom?
Luis because his sample is taken from the population of all seventh graders

Luis because he samples fewer students

Samantha because she samples more students

Samantha because her sample is taken from the population of students who use the library
Mathematics
1 answer:
inessss [21]3 years ago
4 0
I would choose A. Samantha is testing the actual question "how many LIBRARY books are checked out by 7th graders at SAME time". She is still getting a result to the question, but an inaccurate reading as we do not know if ALL 7th graders are present in library and she is only doing a portion of 7th graders checking out books. However, Luis is going to cafe and some may never have gone to library or dislike reading tangible material. Basically both are bad surveyors, but Luis is definlately performing a more random approach.
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Evaluate for x and y<br> 4x-6y=-26<br> -2x+3y-13
kap26 [50]

Answer:

(x, y) = (- 13/2 + 3/2 * y, y) ,y in mathbb R

Step-by-step explanation:

4x-6y=-26

-2x+3y-13

4x-6y=-26

x=-13/2+3/2y

4(-13/2+3/2y) - 6y=-26

y in mathbb R

x, y) = (- 13/2 + 3/2 * y, y) ,y in mathbb

5 0
1 year ago
If triangle ABC is similar to triangle DEC, find the values of x and y.
Mumz [18]

The values are x=8 and y=35, if the given ΔABC and ΔDEC are equal, it is obtained by Pythagoras theorem.

Step-by-step explanation:

The given are,

           From ΔABC,

                    AB= 6

                    BC= 10

                    AC = x

           From ΔDEC,

                    CD= 28

                    DE= 21

                    CE = y

Step:1

        Pythagoras theorem from  ΔABC,

                    BC^{2}=AB^{2} + AC^{2}...............(1)

       Substitute the values,

                   10^{2} = 6^{2} + AC^{2}

                  100 = 36 + AC^{2}

                   AC^{2} = 100 - 36

                           = 64

                    AC = \sqrt{64}

                    AC = 8

                  AC = x = 8

Step:2

        Pythagoras theorem for ΔDEC,

               CE^{2} = CD^{2}  + DE^{2}................(2)

       From the values,

              CE^{2} = 28^{2} + 21^{2}

             CE^{2} = 784 + 441

                     = 1225

              CE = \sqrt{1225}

              CE = 35

             CE = y = 35

Result:

         The values are x=8 and y=35, if the given ΔABC and ΔDEC are equal.

5 0
3 years ago
A rental truck costs $96 per day plus $0.60 per each mile. If Calvin can spend a maximum of $120, how many miles can he drive th
nikdorinn [45]

Answer:

40 miles

Step-by-step explanation:

You would have to start by doing $120 - $96 for the per-day fee, which leaves Calvin with $24 to spend on miles.

Next you would do $24 ÷ $0.60 to find the number of miles he can drive, which is 40 miles.

5 0
3 years ago
2. The expression (x-7) is a factor of x^3 - 10x^2 + 11x + 70.
VARVARA [1.3K]

Answer: Try x=3+2 root46 over 5

Or 3-2root46 over 5

Step-by-step explanation:

5 0
3 years ago
When (x+2)^6 is written as a polynomial, what is the coefficient of the term containing x^4
Alik [6]

Answer:

c-120

Step-by-step explanation:

6 0
3 years ago
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