Answer:
I wasn't 100% sure what you were asking, but
8+5+8=21 coins in total.
8/21*7/20=
56/420=
2/15. Hope this helps, and PM me if something's not clear!
Answer:
-4 and 9
Step-by-step explanation:
we have

we know that
The formula to solve a quadratic equation of the form
is equal to
in this problem we have


so
substitute in the formula
therefore
The equation is true for -4 and 9