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gtnhenbr [62]
3 years ago
9

What happens to a negative number when you take its absolutr value

Mathematics
2 answers:
Ahat [919]3 years ago
8 0

It loses its negative sign.
Stolb23 [73]3 years ago
6 0
It becomes a positive number. A number's absolute value is the number of spaces it is away from 0 on a number line. If you're on negative 5, it is 5 spaces away from 0, so it's absolute value is 5.
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3 years ago
Which is a quantitative variable?
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Variables that have are measured on a numeric or quantitative scale. Ordinal, interval and ratio scales are quantitative.

Step-by-step explanation:

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3 years ago
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What is the value of the digit 8 in 686,293
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3 0
3 years ago
Let x^2+15x=49
Slav-nsk [51]
<span>x^2 + 15x + 56.25 = 105.25

    "Completing the square" is one of many different techniques for solving a quadratic equation. What you do is add a constant to both sides of the equation such that the lefthand side can be factored into the form a(x+d)^2. For instance, squaring (X+D) = X^2 + 2DX + D^2. Notice the 2DX term. That is the same term as the 15x term in the problem. So 2D = 15, D = 7.5. And D^2 = 7.5^2 = 56.25.
So we have
 x^2 + 15x + 56.25 = 49 + 56.25
 Which is
 x^2 + 15x + 56.25 = 105.25
  Which is the answer desired.

   Now the rest of this is going beyond the answer. Namely, it's answering the question "Why does complementing the square help?" Well, we know that the left hand side of the equation can now be written as
 (x+7.5)^2 = 105.25

   Now take the square root of each side
 (x+7.5) = sqrt(105.25)

   And let's use both the positive and negative square roots.
So x+7.5 = 10.25914226
 and
 x+7.5 = -10.25914226

   And let's find X.
 x+7.5 = 10.25914226
 x = 2.759142264

   x+7.5 = -10.25914226
 x = -17.75914226

   So the roots for x^2 + 15x - 49 is 2.759142264, and -17.75914226</span>
3 0
3 years ago
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