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3 years ago

Simplify -4 + (-3) + 6

1 answer:

3 0

Start off with: -4 + (-3) + 6

First of all, when there is a, + sign and a - sign next to each other, the - side wins. E.g. 1 +- 3 = 1 - 3

So, apply this to our one:
-4 -3 +6

From there you solve, you can do this using the number line method or whatever you are into:
=-7 + 6
=-1
The answer is -1

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3 years ago

Here is a system of equations:

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In Class 1, what is the median score? A) 70 B) 70.5 C) 71.5 D) 72

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Answer:

B) 70.5

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Median = middle value when the values are placed in order.

If there are two middle values, the median is the mean of those two values.

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45 46 51 52 53 53 61 63 64 65 66 68 70 70 71 73 76 77 79 81 82 83 84 87 90 92 93 95

There are 28 values in Class 1.

Therefore, there are two middle values: 14th and 15th values

14th value = 70

15th value = 71

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