book
Maths Puzzle
Numerical Ability
twenty-one minus the sum of fifteen and five
How would i write this problem out in mumerical form
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book Other Question
A magnetic head has worn down to the chord line AB measuring .250 inch. If the orginal gap depth is .125 inch how much useful head life remains ?
In this problem you are to factor out the expression.
3x^2(r + 3s) -6y^2(r + 3s) I can not figure out how this is the answer:
3(r + 3s)(x^2-2y^2)
Please show the steps.