Um...I don't see any three digit numbers in the set {2, 0, 1, 9}. I only see single-digit numbers.
All the same colour = 5 ways
3 the same and one different = 5C2*2 = 20 ways
2 of one colour and 2 of another = 5C2*2 =20ways
2 the same and 2 different = 5C3*3*3 = 90ways
all colours different = 5C4*3*2= 30 ways
5+30+20+20+90 = 165 ways
No problem! I try to help when I can!
Why is mine the best answer? I forgot to explain, and your answer, CPhill, explained everything clearly and brilliantly. I give CPhill's answer the title of Best Answer.
Note that tan (2pi - x) =
sin (2pi - x) sin2pi * cosx - cos2pi *sinx
_________ = _______________________ =
cos (2pi - x) cos2pi *cosx + sin 2pi * sinx
- sin x
_____ =
cos x
- 2 / sqrt (29)
___________ =
5 / sqrt (29)
-2/5
Just as PM found.......!!!!
Thank you so much!
Wait for someone else's answer to confirm. I am not 100% sure.
\(-\dfrac{2}{5}\)
- PM
A) h>= 0
The height cannot be greater or equal to 0, then how can it be in the air for 4 seconds? (C)
The ball could travel faster than 1 foot per second, so the height does not have to be in between 0 and 4 (B) same with (D)
Math allows people to count how many berries are on a tree. (At least for ancient cavemen)
IDK
It was discovered because some ancient person wanted to count how many berries were on a tree.
Thank you both! Your answers were both REALLY good! I hit the like button for both of you, and I wouldn't have been able to solve it! Thanks!
You can learn the binomial theorem and memorized pascal's triangle to help yourself.
n choose 1 is always n. Similarly, n choose n and n choose 0 are always 1.
\({n}\choose{1}\) = n. \({n}\choose{n}\) = \({n}\choose{0}\) = 1.
14C7 possible hands that i can have half will win (someone has to win) 3432/2 = 1716 winning hands
Note that if
(x + 7) (x - 1) = 0
Then either x + 7 = 0 which implies that x = -7 makes this true...so this is a root
OR
x - 1 = 0 which implies that x = 1 makes this true.......so this is also a root
xxxxxxxx
OK....not too much here
(x + 7) ( x - 1) = 0
x^2 + 7x - 1x - 7 = 0
x^2 + 6x - 7 = 0
Just n
We have n things and we want to choose just 1
n ways to do that !!!
OK.....!!!!
I don't think you are done with your answer, so I'll just finish it for you.
Substituting into b = a - 8 and c = a - 5 is probably more helpful...
