exam Maths Puzzle Numerical Ability

I need to solve for w and find the solution set for the following: Sqrt (5w-1) = w-3. I multiplied both sides by sqrt (5w-1) and got (5w-1) = w-3(sqrt (5w-1).

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exam Other Question

Use the concept of slope to determine if the given figure is a parallelogram or a rectangle.


I do not understand how to determine this. I have a picture but I cannot paste it here. Can you help me with understanding the concept?
factor by grouping:

4x^2 + 28x + 24x - 168