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Bogdan [553]
3 years ago
14

Three boxes have a total weight of 640 pounds. Box A weights twice as much as Box B. Box C weight 30 pounds more than Box A. How

much do each of the boxes weigh?
Mathematics
1 answer:
Zarrin [17]3 years ago
4 0

Answer:

  A: 244 pounds

  B: 122 pounds

  C: 274 pounds

Step-by-step explanation:

We have A+B+C = 640; A=2B; C=A+30. Substituting the last into the first gives ...

  A + B + (A +30) = 640

  2A +B = 610 . . . . . . . . . . . . subtract 30

Substituting the second into this equation gives ...

  2(2B) +B = 610

  B = 610/5 = 122 . . . . . divide by 5

  A = 2B = 244 . . . . . . . .find A from B

  C = A+30 = 274 . . . . . find C from A

Box A weighs 244 pounds; box B weighs 122 pounds; box C weighs 274 pounds.

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Step-by-step explanation:

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3 years ago
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otez555 [7]
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slope(m) = (-6-5) / (9 - (-2) = -11/11 = -1

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now we sub and solve for b, the y int
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3 years ago
Find the equation of the line that has a slope of 5 and passes through the point (-8,6).
Umnica [9.8K]
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3 years ago
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The hypotenuse in this 45-45-90 triangle is given. How would you find the length of a leg
Viefleur [7K]

Answer:

The length of the legs of the triangle is 8 units.

Step-by-step explanation:

45-45-90 triangle

A 45-45-90 triangle is a special case of a right triangle in which both legs l have the same value and the hypothenuse is h. By the Pythagorean Theorem:

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Hypothenuse of 8 V2

This means that h = 8\sqrt{2}

So

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2l^2 = (8\sqrt{2})^2

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