exam Maths Puzzle Numerical Ability

Janet kim is now 13 years old, her father is now 31

write an equation stating that jeong is twice as old as janet, then solve it to find out when jeong is twice as old as janet

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Divide. x^3+2x^2+x+12 ÷ x+3 Dear Tutors,

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The area of a rectangular playground is 2,700 ft2. The length is 3 times the width. What are the dimensions of the play ground? Please help!!!THANKS