If the first and the last terms of an arithmetic series are 10 and 62, show that the sum of the series varies directly as the nu
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<h3><u>Answer:</u></h3>
- x = 7.2
- Perimeter: Side 1 + Side 2 + Side 3
- => x + 4 + 3x + 7 + x + 9 = 56
- => 5x + 20 = 56
- => 5x = 56 - 20
- => 5x = 36
- => x = 7.2
Therefore, the value of x is 7.2.
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