book Maths Puzzle Numerical Ability

x^3-27=(x-3)(x-3)(x-3)
Did I do the problem right? He wanted me to factor completely.

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book Other Question

Could someone help me solve this problem?

Find the circumference of 3.75 ft. Use 3.14 for pie and round your answer to one decimal place.
Thanks!
Sher What is the solution to the system of equations x(squared) -x+6= y and 2x+2y=36?
Also how do you get your answer?