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miss Akunina [59]
3 years ago
15

What’s 10x-6y+3x-7x+9y

Mathematics
1 answer:
DedPeter [7]3 years ago
4 0
6x+3y should be the answer
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In your biology class, your final grade is based on several things: a lab score, scores on two major tests, and your score on th
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Answer:

Weighted\ Average =  73

Step-by-step explanation:

Given

Lab = 21\%

Tests = 25\%

Exam = 29\%

Lab\ Score = 60

First\ Test = 81

Second\ Test = 69

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Required

The weighted average

To do this, we simply multiply each score by the corresponding worth.

i.e.

Weighted\ Average =  Lab\ worth * Lab\ score + Tests\ worth * Tests\ score.....

So, we have:

Weighted\ Average =  21\% * 60 + 25\% * 81 + 25\% * 69 + 29\% * 79

Using a calculator, we have:

Weighted\ Average =  73.01

Weighted\ Average =  73 --- approximated

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Jose's Bikes rents bikes for $14 plus $3 per hour. Heather paid $38 to rent a bike. For how many hours did she rent the bike?​
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Answer:

8 hours

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14 + 3x =38

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--------------------

3x = 24

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