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Maths Puzzle
Numerical Ability
During a sale, the price of a book is reduced by 25%. The sale price is then further reduced by 40%. The cost of the book as a percentage of the original price is?
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NEED HELP SOLVING THIS QUADRATIC EQUATION
4x^2 + 8x =0
can someone TEACH me how to find a boundry of a line??????(step by step)
for example--- Y>/ x+3
y>/ -x+1