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svetlana [45]
3 years ago
15

Alexis received an 85, 89, and 92 on three tests. How many points does she need to score on her next test in order to have an av

erage of at least 90?
Mathematics
1 answer:
Tpy6a [65]3 years ago
6 0
Alexis needs to score at least 96 points on her next test in order to have an average of at least 90.

explanation:
85+89+92+96= 360
359/4=90
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2 years ago
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slavikrds [6]

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3 years ago
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3 years ago
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s344n2d4d5 [400]
<h3>Answer: Choice D</h3>

=======================================================

Explanation:

The long way to do this is to multiply all the fractions out by hand, or use a calculator to make shorter work of this.

The shortest way is to simply count how many negative signs each expression has.

The rule is: if there are an even number of negative signs, then the product will be positive. Otherwise, the product is negative.

For choice A, we have 3 negative signs. The result (whatever number it is) is negative. Choice B is a similar story. Choice C is also negative because we have 1 negative sign. Choices A through C have an odd number of negative signs.

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