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lisov135 [29]
3 years ago
13

Eunice and Belinda weighs 267 pound 6 ounces. Eunice and Laura weighs 223 pounds and 8 ounces. Laura weighs 136 pounds and 11 ou

nces. How much does Belinda weigh?
Mathematics
1 answer:
Ad libitum [116K]3 years ago
5 0

Answer:

180  9/16 lb

Step-by-step explanation:

Let the weights of the three girls be E, B and L.

Note that E + L = 223  8/16 lb, so subtracting L from both sides, that is, subtracting 136  11/16 lb from both sides, results in:

                E = 223  8/16 lb  -  136  11/16 lb  =  86  13/16 lb

Thus, E's weight is 86  13/16 lb,

          B's weight is 267  6/16 lb  -  86  13/16 lb = 180  9/16 lb

          L's weight is 136 11/16 lb.

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The length of a rectangular driveway is five feet more than three times the width. The area is 350ft2. Find the width and length
crimeas [40]

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  • width -- 10 ft
  • length -- 35 ft

Step-by-step explanation:

We can let x represent the width. Then the length will be represented by (3x+5), a value 5 more than 3 times the width.

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  A = (3x +5)(x) = 3x^2 +5x

To make the area 350, we can find the value of x from ...

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This can be solved a number of ways. One of them is "completing the square".

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We choose to divide by 3 and add the square of half the x-coefficient.

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