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Oksi-84 [34.3K]
3 years ago
12

(2a^2-5)+(3a^2-6a+3)​

Mathematics
1 answer:
Ne4ueva [31]3 years ago
6 0

Answer:

5a^2-6a-2

^^^^

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There is good evidence that moderate alcohol use improves health. Some people think that red wine is better for your health than
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Independent measures, or repeated measures,

Step-by-step explanation:

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ivann1987 [24]

9514 1404 393

Answer:

  • large: 55 lb
  • small: 30 lb

Step-by-step explanation:

Let x and y represent the weights of the large and small boxes, respectively. The problem statement gives rise to the system of equations ...

  x + y = 85 . . . . . combined weight of a large and small box

  70x +50y = 5350 . . . . combined weight of 70 large and 50 small boxes

We can subtract 50 times the first equation from the second to find the weight of a large box.

  (70x +50y) -50(x +y) = (5350) -50(85)

  20x = 1100 . . . . simplify

  x = 55 . . . . . . . divide by 20

Using this in the first equation, we can find the weight of a small box.

  55 +y = 85

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A large box weighs 55 pounds; a small box weighs 30 pounds.

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3 years ago
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