exam Maths Puzzle Numerical Ability

For what values of x is the value of each expression a real number?
1. square root of x
2. 5-square root of x
3. square root of x+3

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exam Other Question

C-9 Automotive Trades- Total piston diplacement is given by the following formula
Whe. P.O.= piston diplacement in cubic inches
D= diameter of bore of cylinder
L= The range of a set of scores is 42, and the lowest score is 28. Write and solve an equation to find the highest score. Hint in a data set, the range is the didderence between the highest and the lowest values.