exam
Maths Puzzle
Numerical Ability
a triangle has 3 sides 3x7 4x9 5x+6. find the expression that represents this perimeter
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exam Other Question
An oil tanker can be emptied by the main pump in 4 hours and by an auxiliary pump in 9 hours. If the main pump is started at 9 a.m., when should the auxiliary pump be started so that the tanker is emptied by noon?
Please help me solve this using the quadratic formula:
2x^2+x=21