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OLEGan [10]
2 years ago
11

Which statement is true?

Mathematics
1 answer:
o-na [289]2 years ago
4 0
I believe the answer should be D, since equilateral triangles means that all the sides are the same length, and congruent means two figures having the same length, and the same shape.
Hope this helps!
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An EPA contractor needs to test the concentration of a substance in ten samples of the ground water. Seventy samples were
olga55 [171]

Answer:

Systematic sampling

Step-by-step explanation:

An EPA contractor needing to test the concentration of a substance in ten samples out seventy samples provided form a single source at regular time intervals.

For the contractor to effectively carry out the testing he has to employ a Non-probability system of sampling which is called Systematic sampling, because in systematic sampling we can assume the population size (x ) which in this case is 70 and the sample size( n ) to be 10

He will have to select ;  ( x / n )^th of the sampling frame for best results

7 0
3 years ago
What is the y-intercept, axis of symmetry and vertex of the following function.
tamaranim1 [39]
To find the y intercept you must substitute 0 into x.

F(x) = (-3x0) - (6x0) - 5
F(x) = -5

To find the axis of symmetry and vertex we use the formula -b/2a to find the x coordinate

x = 6/(-3x2)
x = 6/-6
x = -1

Now we need to find the y coordinate so we sub -1 into x.

F(x) = (-3x-1) - (6x-1) - 5
F(x) = 3 + 6 - 5
F(x) = 4

The axis of symmetry and vertex are (-1,4) and the y coordinate is -5. Hope this helps.
5 0
2 years ago
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Find the median of the data in the pictograph below. Caroline has 2. Samuel has 4. Abby has 4. Jason has 2
atroni [7]

Answer:

3

Step-by-step explanation:

The median is the central number of the data. Align numerically (2, 2, 4, 4) and find the center number. Since there are two, find the average of 2 and 4 to get 3. ([2+4]/2=3)

3 0
3 years ago
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The correlation coefficient r between an employee’s age, x, and yearly salary, y, is 0.633. What percent of the variation in yea
son4ous [18]

Answer:

The answer is 40.1%

Step-by-step explanation:

I just took the test

6 0
3 years ago
Lewis wants to play several games of paintball with his friends. At the park, it costs $16.97 for admission and paintballs, and
SpyIntel [72]

B, $5.10x (it doesnt give you the ammount of games he played so x represents it) + $16.97 (the cost he payed to get in)

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3 years ago
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