The mean and median of a normal distribution are the same.
The median is 16.
Let n = number
"3 times the sum of a number and 7" translates to 3(n + 7)
"2 less than five times the number" translates to 5n - 2
The word "is" becomes the equals sign.
3(n + 7) = 5n - 2
I think you already asked this one.
The best and most correct answer among the choices provided by your question is the third choice or letter C.
A diagonal is the term that describes the dotted line in the quadrilateral.
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Drawing length = 9 cm; actual length = 400 cm is the incorrect one