I can't read that language but I'll guess it says write a second degree equation then solve for n when d=10.
Answer: n² - 3n - 20 = 0
That doesn't factor so there is no integer n solution.
That means there are no polygons with 10 diagonals.
Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. 15−4x 15−4x 4x−15 4x−15 (4+x)−15
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Evaluate this...
the x at the bottom cancels out one of the xs at the top so it will be
Now the one cancels out one of the 1s in the -4 so
Hope this helps :)
the x at the bottom cancels out one of the xs at the top so it will be
Now the one cancels out one of the 1s in the -4 so
Hope this helps :)