exam
Maths Puzzle
Numerical Ability
How many gallons of 50% antifreeze must be mixed with 80 gallons of 20% antifreeze to get a mixture that is 40% antifreeze?
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exam Other Question
Write the quadratic equation with a lead coefficient of 1 whose roots are 1+3i and 1-3i.
Could someone show me how to this step-by-step, please?
Quadratic equations can be solved by graphing, using the quadratic formula, completing the square, and factoring. What are the pros and cons of each of these methods? When might ea