exam
Maths Puzzle
Numerical Ability
How many grams of pure silver must be mixed with 450grams of an alloy that is 10% copper in order to produce a sterling silver that is 7.5% copper?
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exam Other Question
A number is 2 1/10 more than its reciprocal. Find the number.
{2/3, 3/5, 5/4, 5/2}
Please teach me how to do this in order by order!!! PLEASE!!! Thank you.
Hello,
I need help finding the equation of the axis of symmetry and the coordinates of the vertex of the graph of: y=2x^2+4x-5
Thank you