exam
Maths Puzzle
Numerical Ability
Solve the system of inequalities by graphing the solution region:
{ x+2y<_ 3
2x-3y<_6 }
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exam Other Question
A 30% nickel alloy is to be melted with an 80% nickel alloy. How many grams of each must be used to obtain 50 grams of a 50% nickel alloy?
1.Is (5,-2) a solution of the system?
2x+6y=-2
x+2y=1
2.Is (5,-2) a solution of the system?
2x+6y=-2
2x+y=6
3.Is (2,-1) a solution of the system?
2x+6y=-2
x+2y=1
4.