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Usimov [2.4K]
3 years ago
11

I have to find the area

Mathematics
2 answers:
andrew11 [14]3 years ago
6 0
Your best choice is 11.55. 

5.5 · 4.2 equals 23.1. You don't need the 6.9.

You then need to do 23.1 ÷ 2 which is 11.55 m².

Hope this helps!
Alina [70]3 years ago
4 0
The formula for finding the area of a triangle is: base*height*1/2
So, if we use this information....
4.2*5.5*1/2=11.55
Area=11.55
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The total scores of the x students from class A can be calculated by multiplying x and the average which is equal to 85. That is 85x.

In similar manner, we are able to find for the total scores of the students from Class B. That would be, 90y.

Combining the scores, the new average then becomes 88. This is equal to,

                                 (85x + 90y) / (x + y ) = 88

Cross-multiplying,
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Combining terms,
                              -3x = -2y

The ratio is obtained through the step below,
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