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3 years ago

At Clement's Jr. High School, a student needs an 86 average to earn a B. Sue's average on

Mathematics

1 answer:

andriy [413]3 years ago

5 0

Answer:

Sue must score 94 on the final test to earn a B.

Step-by-step explanation:

There are five tests in total.

Sue's average on the first four tests is 84.

If after the final test, she scores X, she will have a B on average of five tests.

We have the following equation:

86 = (4 × 84 + X)/5

<=> X = 5 × 86 - 4 × 84

=> X = 94

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2 years ago

Simplify the expression 2√ 20 − 3√ 7 − 2√ 5 + 4√ 63 .

earnstyle [38]

Answer:

The simplified form is,

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Step-by-step explanation:

The given expression is,

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$=2\sqrt{4\times 5}-3\sqrt{7}+2\sqrt{5}+4\sqrt{9\times 7}$

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3 years ago

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Akimi4 [234]

Answer:

Step-by-step explanation:

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2 years ago

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Step-by-step explanation:

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