exam Maths Puzzle Numerical Ability

Find all positive values for k for which each of the following can be factored.
x squared +x-k

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exam Other Question

An employee who produces x units per hour earns an hourly wage of y = 0.80x + 11 (in dollars). Find the hourly wage for an employee who produces 19 units per hour. Jen rode her bike 63 miles. She rode twice as many miles on paved road as she did on dirt road. How many miles did she ride on paved road?