exam Maths Puzzle Numerical Ability

Please help me learn how simplify and solve:
Fraction

7 over xto the neg 2

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exam Other Question

Two dice are rolled. Find the indicated probability.

What is the probability that the sum is even if the first die is 4? An employee who produces x units per hour earns an hourly wage of y = 0.60x + 7 (in dollars). Find the hourly wage for an employee who produces 8 units per hour.