Answer:
minus 15
Step-by-step explanation:
times the bottom by the right hand side
Answer:
Step-by-step explanation:
(2n - 3)(5n + 6) = 2n*(5n + 6) -3*(5n +6)
=2n*5n + 2n*6 -3*5n + (-3)*6
=10n² + 12n - 15n - 18
= 10n² -3n - 18
5/8 = 0.625
To turn a decimal into a fraction, move the decimal point two spaces to the right.
0.625 = 62.5%
62.5% of the pieces are used for the background
Answer:
12
Step-by-step explanation:
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.
