exam Maths Puzzle Numerical Ability

How do I figure out what the domain and rande of something is that is (-7,4) and the vertex is -5?

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exam Other Question

Nine more than a number squared is 25. Write an equation that can be used to find the unknown number, y.

(9y)2=25

I am unsure how to solve this problem.

According to the American Society of Heating, Refrigerating and Air conditioning engineers, inc, a nonsmoking classroom should have a ventilation rate of 15 ft (to the third power)