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lana [24]
3 years ago
13

1. ABCD is a rectangle. BD is a straight line that cuts the rectangle into equal halves. The ratio of the area of P to the area

of Q is 2 : 5, and the ratio of the area R to the area of S is 4 : 3. The area of S is 9 square centimeters.
  a)   Find the ratio of the area of R to the area of the rectangle.   Find the area of the rectangle

Mathematics
1 answer:
Nastasia [14]3 years ago
7 0
S is 3 parts of R, or 9.  9 is 3/4 of 12, so R is 12. 12 plus 9 is 21, which is half of the full area of the rectangle. The area of the rectangle is 42 square centimeters. Now, we need to find what R is to the whole rectangle. We know that R is 12 square centimeters, and that the rectangle is 42 square centimeters. That ratio is 12 to 42. If it is simplified, that would be 6 to 21. If it is simplified further, you find that it is 2 to 7. Hope this wasn't too confusing, and I hope that I helped :)
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Answer:

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Step-by-step explanation:

At Lisa's printing Company LLC there are two kinds of printing presses model.

Let x = the number of model A printing press.

Let y = the number of the model B printing press.

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The total number of both models prints 905 bucks per day.

This means

70x + 55y = 905 - - - - - - - - -1

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x + y = 14 - - - - - - - - - -2

x = 14-y

Put x = 14-y in equation 1

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980 -70y + 55y = 905

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y = -75 / -15= 5

x = 14-y = 14-5

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