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Oksana_A [137]
4 years ago
15

Christopher is 20 years younger than Ishaan. Ishaan and Christopher first met two years ago. Fourteen years

Mathematics
1 answer:
Anna71 [15]4 years ago
5 0
I am the one and only batmannn.
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Three randomly selected households are surveyed. the numbers of people in the households are 1,3,8 assume that samples of size n
Naily [24]
I assumed that 3 households are sampled.
Now, is the number in each of these households equal to 1, 3 and 8 people?

Next, the question says, samples of n=2 are randomly selected (with replacement) from these 3.

So are sample space is
11
13
31
33
18
81
38
88
83
88

This is done 9 times.
Is that how you understand the problem?
When they select the household with only 1 person, the variance is 0
When they select the household with 8 people, they variance will be from a discrete uniform distribution

Similarly for household with 3 individuals.



5 0
4 years ago
What set of reflections would carry rectangle ABCD onto itself?
Dvinal [7]

Answer:

  y=x, x-axis, y=x, y-axis

Explanation:

Reflecting the figure across three axes just moves it from one quadrant to another. It does not map the figure to itself.

Reflecting across the line y=x moves it from quadrant II to IV or vice-versa. If it is in quadrant I or III, it stays there. So the sequence of reflections x-axis (moves from I to IV), y=x (moves from IV to II), x-axis (moves from II to III), y=x (stays in III) will not map the figure to itself.

However, the last selection will map the figure to itself. The initial (and final) figure location, and the intermediate reflections are shown in the attached. The figure starts and ends as blue, is reflected across y=x to green, across x-axis to orange, across y=x to red, and finally across y-axis to blue again.

7 0
4 years ago
Explain how knowing 50 x 4 = 200 helps you find 500 X 400?
Simora [160]
If you know the answer to 50 x 4 = 200 then you can just add the other zeros
4 0
3 years ago
I need help on ratios
Klio2033 [76]

Answer:

-help

Step-by-step explanation:

A ratio compares values. A ratio says how much of one thing there is compared to another thing. A ratio indicates how many times one number contains another.

example:  there are 6 girls to 4 boys. (6:4)

4 0
3 years ago
Through (-1,3) parallel to y= 5/4x+3
gavmur [86]

Answer:

The equation of line with slope  \frac{5}{4}  and points  ( - 1 , 3 ) is y =  \frac{5}{4} x +  \frac{17}{4}

Step-by-step explanation:

Given equation of a line as :

y = \frac{5}{4} x + 3

The line equation is in the form of y = m x + c

Where m is the slope of the line

Now while comparing given line equation with standard line equation ,

So , slope of the line m = \frac{5}{4}

∵ Another line is passing through points ( - 1 , 3 ) , and is parallel to given line

Now <u>if two lines are parallel then slope of both lines are equal </u>

Let The slope of another line = M

So, M = m = \frac{5}{4}

∴ The equation of line with slope \frac{5}{4}  and passing through points ( - 1 , 3 ) is

y - y_1 = M × ( x -  x_1 )

Or, y - 3 =  × \frac{5}{4}  ( x + 1 )

or,  4 × (  y - 3 ) =  5 ×   ( x + 1 )

Or,  4 y - 12 = 5 x + 5

Or,  4 y = 5 x + 17

∴   y =  \frac{5}{4} x +  \frac{17}{4}  

Hence The equation of line with slope  \frac{5}{4}  and points      ( - 1 , 3 ) is y =  \frac{5}{4} x +  \frac{17}{4}   Answer

3 0
3 years ago
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