Quadratic equation
The quadratic equation x^2 - 5x + k = 0 has roots p and q. Given that, p + q = 7 and pq = 10, find the value of k.
Word Problem
A bridge is built across a river. One quarter of the bridge is over the left bank of the river and one third of the bridge is over the right bank. The river is 120 m wide. How long is the bridge?
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