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sasho [114]
3 years ago
13

Twenty students in class A and 20 students in class B were asked how many hours they took to prepare for an exam.

Mathematics
1 answer:
d1i1m1o1n [39]3 years ago
6 0
The mean study time is less for class b then class a
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aev [14]
Square root of 6 times 16 will give us 39.19

The square root of 48 times 32 [which gives us 1536] is also equal to 39.19

The square root of 1536 is equal to 39.19

Hence, x is equal to 32

Hope this helped! :D
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Step-by-step explanation:

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Whats the area of this shape
forsale [732]
First cut the shape into a square, triangle and rectangle. Then add all 3 areas. Area of a quadrilateral is A= b x h So once square is 4 X 4= 16. The rectangle has a area of 4 x 2= 8. The triangle, using the formula 1/2bh has an area of 1/2 x 2 x 4 = 4. So the area of the shape is 16 + 8 + 4 = 28 units
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3 years ago
Solve for x: 9(x+1) = 25+X
Inessa [10]

Answer:

x=2

Step-by-step explanation:

9(x+1) = 25+x      

<u>Distribute the 9:</u>

<u />

  9x+9=25+x      

   

<u>Subtract x on both sides:</u>

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  8x+9=25                      

   

<u>Subtract 9 on both sides:</u>

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        8x=16    

                           

<u>Divide both sides by 8:</u>

          x=2

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3 years ago
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