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Irina18 [472]
3 years ago
15

#20 There are 75 students.

Mathematics
2 answers:
agasfer [191]3 years ago
8 0

Answer:

15

Step-by-step explanation:

 1.  Multiply the number by the percent (e.g. 87 * 68 = 5916)

 2.  Divide the answer by 100 (Move decimal point two places to the left) (e.g. 5916/100 = 59.16)

 3. Round to the desired precision (e.g. 59.16 rounded to the nearest whole number = 59)

lianna [129]3 years ago
6 0

Answer:

i belief the answer is 15

Step-by-step explanation:

cause 20 percent of 75 is fifteen

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Consider the following set of vectors. v1 = 0 0 0 1 , v2 = 0 0 3 1 , v3 = 0 4 3 1 , v4 = 8 4 3 1 Let v1, v2, v3, and v4 be (colu
Alona [7]

Answer:

We have the equation

c_1\left[\begin{array}{c}0\\0\\0\\1\end{array}\right] +c_2\left[\begin{array}{c}0\\0\\3\\1\end{array}\right] +c_3\left[\begin{array}{c}0\\4\\3\\1\end{array}\right] +c_4\left[\begin{array}{c}8\\4\\3\\1\end{array}\right] =\left[\begin{array}{c}0\\0\\0\\0\end{array}\right]

Then, the augmented matrix of the system is

\left[\begin{array}{cccc}0&0&0&8\\0&0&4&4\\0&3&3&3\\1&1&1&1\end{array}\right]

We exchange rows 1 and 4 and rows 2 and 3 and obtain the matrix:

\left[\begin{array}{cccc}1&1&1&1\\0&3&3&3\\0&0&4&4\\0&0&0&8\end{array}\right]

This matrix is in echelon form. Then, now we apply backward substitution:

1.

8c_4=0\\c_4=0

2.

4c_3+4c_4=0\\4c_3+4*0=0\\c_3=0

3.

3c_2+3c_3+3c_4=0\\3c_2+3*0+3*0=0\\c_2=0

4.

c_1+c_2+c_3+c_4=0\\c_1+0+0+0=0\\c_1=0

Then the system has unique solution that is (c_1,c_2c_3,c_4)=(0,0,0,0) and this imply that the vectors v_1,v_2,v_3,v_4 are linear independent.

4 0
3 years ago
1. What does the Spanish phrase iNos vemos! mean in English? (1 point)
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Answer:

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3. answer for the third one is "canyon"

5 0
3 years ago
Pls help... again
Rashid [163]

Answer:

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9x^ - 30x - 25

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4 0
3 years ago
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Point c partitions line segment AB in the ratio 1:3. What is the y-coordinate of c.
Veseljchak [2.6K]

The y-coordinate of c is -4 if the Point c partitions line segment AB in the ratio of 1:3.

<h3>What is a straight line?</h3>

A straight line is a combination of endless points joined on both sides of the point.

We have two points:

A(-4, -7), and B(12, 5)

Let's assume A(x1, y1)  and B(x2, y2)

The ratio is 1:3 = m:n

Let's assume the y-coordinate is a

From the section formula:

\rm a = \dfrac{my_2+ny_1}{m+n}

\rm a = \dfrac{1\times5+3\times(-7)}{1+3}

a = -4

Thus, the y-coordinate of c is -4 if the Point c partitions line segment AB in the ratio of 1:3.

Learn more about the straight line here:

brainly.com/question/3493733

#SPJ1

8 0
2 years ago
A 16-fluid ounce bottle of juice costs $2.00. What is the unit cost?
gtnhenbr [62]
2/16
1/8
0.125/ fluid ounce
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3 years ago
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