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Soloha48 [4]
3 years ago
13

Note: Figure is not drawn to scale.

Mathematics
1 answer:
Shalnov [3]3 years ago
6 0
Area of a trapezoid = ((a+b)/2) * h
a = x + x
b = z + z
h = y

A = ((4 + 12)/2) * 6
A = ((16)/2) *6
A = 8 * 6
A = 48

answer is B
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The difference between two numbers is 12.  Three times the larger number is seven times the smaller.  What are the two numbers? 

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JEEW-M  | CERTIFIED EDUCATOR

Let us say the two numbers are x and y and x>y.

The data we have are;

Difference between the numbers are 12.

3 times larger number is equal to 7 times smaller number.

Then we can write;

 ----(1)

 ----(2)

 

From (1) we can say 

Then substituting  to (2) gives;





      

        

 

Then;





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