QuestionAugust 26, 2025

What is the weighted average of the numbers -3 and 9 with weight 1/3 on the first number and 2/3 on the second number? square

What is the weighted average of the numbers -3 and 9 with weight 1/3 on the first number and 2/3 on the second number? square
What is the weighted average of the numbers -3
and 9 with weight 1/3 on the first number and 2/3 on
the second number?
square

Solution
4.5(210 votes)

Answer

5 Explanation 1. Apply the Weighted Average Formula Use the formula for weighted average: ** \text{Weighted Average} = \frac{w_1x_1 + w_2x_2}{w_1 + w_2} ** where w_1 = \frac{1}{3}, x_1 = -3, w_2 = \frac{2}{3}, and x_2 = 9. 2. Calculate the Numerator Compute w_1x_1 + w_2x_2 = \frac{1}{3}(-3) + \frac{2}{3}(9) = -1 + 6 = 5. 3. Calculate the Denominator The denominator is w_1 + w_2 = \frac{1}{3} + \frac{2}{3} = 1. 4. Compute the Weighted Average Divide the numerator by the denominator: \frac{5}{1} = 5.

Explanation

1. Apply the Weighted Average Formula<br /> Use the formula for weighted average: **$ \text{Weighted Average} = \frac{w_1x_1 + w_2x_2}{w_1 + w_2} $** where $w_1 = \frac{1}{3}$, $x_1 = -3$, $w_2 = \frac{2}{3}$, and $x_2 = 9$.<br />2. Calculate the Numerator<br /> Compute $w_1x_1 + w_2x_2 = \frac{1}{3}(-3) + \frac{2}{3}(9) = -1 + 6 = 5$.<br />3. Calculate the Denominator<br /> The denominator is $w_1 + w_2 = \frac{1}{3} + \frac{2}{3} = 1$.<br />4. Compute the Weighted Average<br /> Divide the numerator by the denominator: $\frac{5}{1} = 5$.
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