Answer:
What are you gonna do is across the x
Step-by-step explanation:
First you have all ten books, but then every time after, you loose one because you can't put the same book in the group twice.
10 * 9 * 8 * 7 = 5040 groups
2/10 because there are 10 cards and there are 5 circles and 3 triangles
Set the 2x - 1 equal to 9 then work backwards. 2x - 1 = 9 Nine minus one is eight divided by two is four. X = 4
15^2 + 36^2 = 39^2
Your answer is 39
