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lana [24]
2 years ago
15

sandra has 4 math test this marking period. she recieved 90%, 87%. and 92% on the first three. what is the minimum score she nee

ds on her last test in order to average atleast a 90% in math class?
Mathematics
1 answer:
Butoxors [25]2 years ago
6 0

She would need to get a 90% or more.

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Identify the reciprocal of each number. Type it in the blank, using a slash () to show a fraction,
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Step-by-step explanation:

When finding the reciprocal, we essentially just "flip" or take the inverse of the number we are given. For example, the reciprocal of 1/2 would be 2/1 or 2. The given number multiplied by the reciprocal should always equal 1. If it does, then we know we are correct.

In this case, we are finding the reciprocal of 5/6, so we "flip" the numerator and the denominator to get 6/5.

To check our work, we need to multiply our original number and its reciprocal.

5/6 x 6/5 = 30/30 = 1

Now, we know we are correct, that the reciprocal of 5/6 is 6/5.

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Using cross products

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