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WINSTONCH [101]
3 years ago
5

Solve 3(2n-7) + 12 =39

Mathematics
1 answer:
natka813 [3]3 years ago
6 0
Your answr is n=8. if this helped plz mark brainliest
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Use a system of linear equations with two variables and two equations to solve. A number is 9 more than another number. Twice
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9514 1404 393

Answer:

  (x, y) = (3, 12)

Step-by-step explanation:

Using the given variable definitions, we can write the equations ...

  y = x + 9

  2(x +y) = 30

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Solving the second equation for y, we have ...

  y = 15 -x

Substituting this into the first equation gives ...

  15 -x = x +9

  6 = 2x . . . . . . . . . add x-9

  3 = x . . . . . . . . . . divide by 2

  y = 3+9 = 12 . . . . substitute into the first equation

The numbers are (x, y) = (3, 12).

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2 years ago
Which triangle’s unknown side length measures 7 units?
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A (A right triangle with a side length of 5 and hypotenuse with length \sqrt{74})

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In order for the data in the table to represent a linear function with a rate of change of –8, what must be the value of m? m =
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19 because it's being subtracted by 8
4 0
3 years ago
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Micah was asked to add the following expressions: 3x2−x−9x2+3x+2+−2x2+2x+5x2+3x+2 First, he combined like terms in the numerator
shtirl [24]

Micah was asked to add the following expressions:

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First step is correct. He added the like terms in the numerator, because the denominators are same.

3x^2 -x -9 -2x^2+2x+5becomes x^2 +x -4

So he got , \frac{x^2+x-4}{x^2+3x+2}

In the next step, he cannot cancel out x^2 from the top and bottom . Because x-4 and 3x+2  are added with x^2

If we have x^2 is multiplied with other terms at the top and bottom , then we can cancel out x^2.

So Micah added the expression incorrectly. Final answer is not correct.

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3 years ago
Another name for the term ____ is trade off
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I think the answer is an auction!
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2 years ago
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