exam
Maths Puzzle
Numerical Ability
Solve for x: (27)(^x-2)=(9^1/3)^x I think the answer is x=4 ?????????/
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exam Other Question
How many gallons of a 42% solution must be mixed with 73 gallons of 12% solution to obtain a 20% solution?
73 + y = t
( 12% of 73) + ( 42% of y ) = 20% of t
73 + y = t
Add. Simplify if possible.
2r/r^2-4 + r/r-2