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4 years ago

6

100 students take a course pass/fail. If they pass they get 4 points towards their GPA, if they fail they get 0. If 90 students

pass, what is the mean and standard deviation (to 1 decimal) of the points earned?

1 answer:

Veronika [31]4 years ago

7 0

Is there a more smiple way to say this

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GIRLL I DONT SEE YOUR PIC

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3 years ago

Give an example of a 2x2 matrix without any real eigenvalues:___________

9966 [12]

Answer:

Step-by-step explanation:

An eigenvalue of n × n is a function of a scalar $\lambda$ considering that there is a solution (i.e. nontrivial) to an eigenvector x of Ax =

Suppose the matrix $A = \left[\begin{array}{cc}-1&-1\\2&1\\ \end{array}\right]$

Thus, the equation of the determinant (A - $\lambda$ 1) = 0

This implies that:

$\left[\begin{array}{cc}-1-\lambda &-1\\2&1- \lambda\\ \end{array}\right] =0$

$-(1 - \lambda^2 ) + 2 = 0$

$-1 + \lambda ^2 + 2= 0$

$\lambda^2 +1 =0$

Hence, the eigenvalues of the equation are $\mathtt{\lambda = i , -i}$

Also, the eigenvalues can be said to be complex numbers.

3 0

3 years ago

Does the point (3 , 4) lie on the line<br>y = 2x -1?

belka [17]

Answer:

No

Step-by-step explanation:

y = 2x -1

Substitute the point into the equation

4 = 2(3) -1

4 = 6-1

4 =5

This is not a true statement so the point is not on the line

5 0

3 years ago

The table below shows a proportional relationship between the number of songs downloaded and the total cost. Determine what valu

Ivan

Answer:

The cost for 5 songs is $5.35

Step-by-step explanation:

Find the unit rate for 1 song by dividing the total cost for 3 songs by 3

$3.21 ÷ 3 = $1.07

The unit rate is $1.07 per song, so multiply that by 5 to find the total cost for 5 songs

$1.07 * 5 = $5.35

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2 years ago

Maria sells painting in a art gallery. She earns $375 each week plus a commission of 2.5% of her swelled. What is the minimum am

geniusboy [140]

Answer:

5000.00

Step-by Step

500.00-375.00 = 125.00

5000 x 2.5% = 125.00

375.00 + 125.00 = 500.00

7 0

3 years ago