If the probability of getting a green is 45%, then the probability of the opposite, not getting a green, is the "complement", namely 100% - 45%, or 55%.
The amount of room he has for more games is 35. 3 times 40 = 120 - 85 = 35.
First lets solve for a:
3a - 2b + 7 = 4a + 10
-3a -3a
-2b + 7 = a + 10
-10 -10
-2b -3 = a
Now, b:
3a - 2b + 7 = 4a + 10
-3a -3a
-2b + 7 = a + 10
-7 -7
-2b = a + 3
b = (a + 3)/-2
Hope this helps!
-9, because the vertex of x^2 would b zero so for it to move to -9 b would need to be -9
