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Illusion [34]
3 years ago
15

The mathematics department at a community college collected data for the number of students enrolled in 40 math classes over the

course of one year. The following stem-and-leaf display shows the total number of students enrolled in each class. Choose the statement below that describes the enrollment data. Key: 10|5 denotes 105 students; 7|2 denotes 72 students3 6 6 7 8 9 4 2 3 3 6 6 5 3 3 8 9 6 2 2 3 5 9 7 2 5 7 8 0 0 3 7 7 9 1 3 5 7 10 0 2 5 7 1 1 3 4 12 1 2 2 A. The distribution of the number of students enrolled in each of 40 math courses is skewed to the right, with a typical class size of 69 students. The smallest class size was 36 and the largest was 122. B. The distribution of the number of students enrolled in each of 40 math courses is unimodal and symmetric. The smallest class size was 36 and the largest was 122. The center (as measured by the median) of the distribution was around 73 students. C. The distribution of the number of students enrolled in each of 40 math courses is skewed to the left, with a typical class size of 88 students. The smallest class size was 36 and the largest was 122. D. The distribution of the number of students enrolled in each of 40 math courses is nearly uniform. The smallest class size was 36 and the largest was 122. The center (as measured by the median) of the distribution was around 73 students. E. The distribution of the number of students enrolled in each of 40 math courses is nearly uniform. The smallest class size was 36 and the largest was 122. The center (as measured by the median) of the distribution was around 88 students.
Mathematics
1 answer:
Colt1911 [192]3 years ago
6 0

Answer:

D.

Step-by-step explanation:

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3 years ago
Determine the number of real solutions for each of the given equations. Equation Number of Solutions y = -3x2 + x + 12 y = 2x2 -
rosijanka [135]

Answer:

Step-by-step explanation:

Our equations are

y = -3x^2 + x + 12\\y = 2x^2 - 6x + 5\\y = x^2 + 7x - 11\\y = -x^2 - 8x - 16\\

Let us understand the term Discriminant of a quadratic equation and its properties

Discriminant is denoted by  D and its formula is

D=b^2-4ac\\

Where

a= the coefficient of the x^{2}

b= the coefficient of x

c = constant term

Properties of D: If D

i) D=0 , One real root

ii) D>0 , Two real roots

iii) D<0 , no real root

Hence in the given quadratic equations , we will find the values of D Discriminant  and evaluate our answer accordingly .

Let us start with

y = -3x^2 + x + 12\\a=-3 , b =1 , c =12\\D=1^2-4*(-3)*(12)\\D=1+144\\D=145\\D>0 \\

Hence we have two real roots for this equation.

y = 2x^2 - 6x + 5\\

y = 2x^2 - 6x + 5\\a=2,b=-6,c=5\\D=(-6)^2-4*2*5\\D=36-40\\D=-4\\D

Hence we do not have any real root for this quadratic

y = x^2 + 7x - 11\\a=1,b=7,-11\\D=7^2-4*1*(-11)\\D=49+44\\D=93\\

Hence D>0 and thus we have two real roots for this equation.

y = -x^2 - 8x - 16\\a=-1,b=-8,c=-16\\D=(-8)^2-4*(-1)*(-16)\\D=64-64\\D=0\\

Hence we have one real root to this quadratic equation.

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Answer:

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Hi guys how is your day going?
Dafna11 [192]

Answer:

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Step-by-step explanation:

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3 years ago
Read 2 more answers
I really need help what's the answer??
lys-0071 [83]
I think you just have to add all of the totals up??
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