exam Maths Puzzle Numerical Ability

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.

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exam Other Question

Solve each equation or system of equations.
y=x-3
7x-2y=21
what is the formula to prove that a parallelogram is a square and contains a right angle?