exam Maths Puzzle Numerical Ability

9 ? x 5 hours = 45 person-hours

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exam Other Question

8.3 # 28
Solve by substitution
Mcgraw Hill 6th editon,
Thank you for your time!!
4x-12y=5
-x+3y= -1 PUT THIS SET OF NUMBERS IN ORDER FROM GREATEST TO LEAST: 3/4; 18%; 0.72