The answer is K. It’s K because when you add all the numbers together it’s A.
Answer:
4 mph
Step-by-step explanation:
Givens
Current = c = 2 mph
Alberta = r = ?
d = 2 mph upstream
d1 = 6 mph downstream
Formula
d = r * t
The time is the same so the formula becomes d/r = t
2/(r - 2) = 6/(r + 2)
Solution
Cross Multiply
2*(r + 2) = 6*(r - 2)
2r + 4 = 6r - 12 Subtract 2r from both sides
4 = 6r - 2r - 12 Combine the right.
4 = 4r - 12 Add 12 to both sides.
4 + 12 = 4r
16 = 4r Divide by 4
16/4 = 4r/4
r = 4
Alberta's rate of travel is 4 mph
From the information below the games is over in 3 sets. For Gina to win the match there are 3 possibilities.
1) Gina wins the first 2 sets with probability 
2)Gina wins the first set. Looses the next set. Wins the third set. 
3)Gina looses the first set. Wins the next 2 sets. 
The required probability that Gina wins is the sum of the above 3 probabilities . That is the probability that Gina wins the match is
Answer:
4x^2 + 3x - 9
Step-by-step explanation:
First, add together functions R(x) and S(x). Stack them vertically and combine like terms:
R(x) = 2 - x^2
S(x) = 2x + 5
------------------
(R+S)(x) = -x^2 + 2x + 7
Now subtract the above result from Q(x):
Q(x) - (R(x) + S(x)) = 3x^2 + 5x - 2 + x^2 - 2x - 7, or 4x^2 + 3x - 9
