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Morgarella [4.7K]
3 years ago
6

Abby surveys every 25th sutend from an alphabetized list of students.l in the school. is this a representative sapmle at Abby's

school? Explain.
Mathematics
1 answer:
Roman55 [17]3 years ago
4 0
Yes, because the sample is random. If she had chosen the participants in any way other than randomly, it would not be representative of her entire school.
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Solve each by elimination<br> x+y =19<br> x - y = -7
Rudiy27
X + y = 19
x - y = -7
Subtract both
2y = 26, y = 13
Plug into first equation
x + 13 = 19
x = 6

Solution: x = 6, y = 13
7 0
3 years ago
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Alja [10]
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3 years ago
Using the graph below, find r(-3) please
ruslelena [56]

Considering the given graph, it is found that the numeric value of the function r(x) at x = -3 is of 2.

<h3>How to find the numeric value of a function given it's graph?</h3>

The numeric value of a function is the value of y for the given value of x, hence, we have to look at the value of x on the horizontal axis, and verify the equivalent value of y on the vertical axis.

In this problem, when the horizontal axis is of x = -3, the vertical axis is of y = 2, hence the numeric value of the function r(x) at x = -3 is of 2.

More can be learned about the numeric value of a function at brainly.com/question/14556096

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7 0
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Step-by-step explanation:

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a system of two linear equations has infinitely many solutions. one of the equations in the system is y-3x=-3.write an equation
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The other equation could be 

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Solving:-

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multiplyng the first equation by 2 gives
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so equations (1) and (2) are the same equation
If we graph them they will be the same line 
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So there are infinitely many solutions
8 0
2 years ago
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