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Gnoma [55]
3 years ago
13

A random sample was taken to determine whether students from a certain classroom prefer to shop at Store A, Store B, or Store C.

There were six students in the sample. Five students preferred Store A, one student preferred Store B, and none of the students preferred Store C.
If there are twenty-four total students in the classroom, about how many of them would you expect to prefer Store A?

20
30
29
5
Mathematics
2 answers:
SashulF [63]3 years ago
8 0

it should be 20

hope this helped:)

klasskru [66]3 years ago
7 0
There should be 20 students 
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This is because we have a list of perfect squares 0,1,4,9,...

We use n-1 in place of n because we're shifting things one spot to the left, since we start at 0 instead of 1.

In other words, if the answer was n^2, then the first term would be 1^2 = 1, the second term would be 2^2 = 4, and so on. But again, we started with 0^2 = 0, so that's why we need the n-1 shift.

You can confirm this is the case by plugging n = 1 into (n-1)^2 and you should find the result is 0^2 = 0. Similarly, if you tried n = 2, you should get 1^2 = 1, and so on. It appears you already wrote the answer when you wrote "Mark Scheme".

All of this only applies to sequence A.

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3 years ago
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den301095 [7]

Answer:

x = 181 and y = 97

Step-by-step explanation:

let called the first number is x

the second number would be called y

We are given that:

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Let change x in (2) into (1):

y + 84 + y = 278

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Because y = 97 and x + y = 278 so x would equal:

x + 97 = 278

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artcher [175]

Answer:

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It's helpful if we think of slope in the context of rise over run.

Since the point (1, 1) lies on the line, because of the slope 2, if we subtract x by 1 to get to x = 0, then we'll be subtracting y by 2.

By that logic, the answer must be (0, -1).

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torisob [31]

Answer:

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This is the required expression because,

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