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Maths Puzzle
Numerical Ability
Three times a number, decreased by 8 is the same as twice the number, increased by 15?Find the number.
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The directions say to factor as completely as possible
(x-5)^3 -1
The answer is (x-6) (x^2 -9x +21)
I cannot figure out how to get this answer. Can you please show the steps?
the question is:
graph the info by drawing tf in the y axis and tc in the x axis and plot the information on freezing and boiling temps as points on the graph.
and it gives us a