exam
Maths Puzzle
Numerical Ability
Not in book
A mixture of 10% acid and 90% water is added to 5 liters of pure acid. The final mixture is 40% water. How many liters of water are in the final mixture?
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exam Other Question
Find all real or imaginary solutions to this equation:
x^-2-9x^-1+18=0
I am no sure really where to start whether I should square the entire problem or what I am stumped. Please help!!
convert to slope intercept form:
-5/8x - 3/7y= 2/3