exam
Maths Puzzle
Numerical Ability
How many gallons each of 25% alcohol and 35% alcohol should be mixed to obtain 20 gallons of 32% alcohol?
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exam Other Question
graph the system of inequalties
y< 5
y greater than or equal to -6
y greater than or equal to -2x -1
y less than or equal to x+ 3
i have a problem with an equation.
8a+4a=144 i don't understand how to solve this equation