exam Maths Puzzle Numerical Ability

section 9.6 # 46


Geometry. The length of a rectangle is 1 cm longer than its width. If the diagonal of the rectangle is 5 cm, what are the dimensions (the length and width) of the rectangle?

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exam Other Question
When does 2 negative numbers equal a positive number Can someone please help me with these. I thought I understood how to solve them but I am stuck and don't know what to do. Thank you.
a) sqrt of x - 1 = 3
b) sqrt of x^3 = 8
c)