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ira [324]
3 years ago
10

Help ya girl out? just a little bit confused, thank you!

Mathematics
1 answer:
saul85 [17]3 years ago
5 0

Answer: D

Step-by-step explanation:

We are given X = 15 - 4y so simply replace any and all X's in the first equation with (15 - 4y). Option D is the best because the X is removed and replaced with the proper writing.

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As notas de dois alunos X e Y estão representadas no quadro abaixo. Por meio da variância, qual deles apresentou ser o mais regu
Reil [10]

Answer:

Aluno X

Step-by-step explanation:

A nota média para os alunos X e Y são, respectivamente:

X_m=\frac{5+3+5+7}{4}=5 \\Y_m=\frac{4+9+4+3}{4}=5

A variância é definida pela seguinte expressão:

V=\frac{\sum(X_i-X_m)^2}{n-1}

Onde n é o numero de termos, neste caso, n = 4.

As variâncias para cada aluno são:

V_x=\frac{(5-5)^2+(3-5)^2+(5-5)^2+(7-5)^2}{4-1} \\V_x= 2.7\\V_y=\frac{(4-5)^2+(9-5)^2+(4-5)^2+(3-5)^2}{4-1} \\V_y= 7.3

O aluno X apresentou uma variância menor do que o aluno Y em suas notas e, portanto, apresentou ser o mais regular.

6 0
3 years ago
a light in a lighthouse rotates 45° & pauses, it rotates & pauses again. the light moves a total of 95° during the 2 rot
Verdich [7]
47.5 cause in the two total rotations, it was 95 so you would divided 95 by two and get 47.5.
5 0
4 years ago
Read 2 more answers
True or false <br> A sample space can be written as an organized list, a table or a tree diagram.
Anna35 [415]
Answer: true I think

6 0
3 years ago
Which representation models a proportional relationship between x and y? (Look at picture)
FromTheMoon [43]

Answer:

b)

Step-by-step explanation:

In every single other option, the y is not corresponding in amount to x. However in b), y is 6 times x, making b the correct answer as it is the only solution where y is directly corresponding to x

3 0
3 years ago
Write an equation in point slope form for the line through the given point with the given slope (-10,-1) m=-1
notsponge [240]

Answer:

y + 1 = -(x + 10)

Step-by-step explanation:

  • Point-Slope Form: y - y1 = m(x - x1)

The given coordinate (-10, -1) are your (x1, y1), so:

  • x1 = -10
  • y1 = -1
  • m =  -1

All you have to do is substitute the given information into the formula:

  • y -(-1) = -1(x -(-10)), which will simplify to y + 1 = -(x + 10)

Remember: Double negatives make a positive so if the given coordinates for (x1, y1) are negatives, they will be added to y or x in point-slope form, not subtracted.

7 0
4 years ago
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