exam Maths Puzzle Numerical Ability

A mother is 4 times as old as her son and in twenty years will be twice as old as her daughter, who is five years older than her brother. How old is each?

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exam Other Question

jeremy has a job at the movie theater. his hourly wage is $7.38 suppose 15% of his income is with hield for taxes and social security.

A. what percent does jeremy get to keep?
Systems of equations can be solved by graphing or by using substitution or elimination. What are the pros and cons of each method?