Answer:
7=857074/5=15/4
Step-by-step explanation:
Answer: 33 students wore blue jeans .
Step-by-step explanation:
Let x be the number of black pants.
Given : For the choir concert, the choir director has asked that everyone wear either black pants or blue jeans.
Three times as many students wore black pants as blue jeans.
i.e. Number of blue pants = 4x
If there are forty-four students in the choir, then we have
Divide both sides by 4 , we get
Thus , the number of black pants = 11
Then , the number of blue pants =
Therefore, 33 students wore blue jeans .
For the number 7, begin by solving for k.
Remember your discriminant rules:
k is greater than 0, there are 2 real solutions
k is equal to 0, there is one real solution
k is less than 0, there are no real solutions
On number 8, solve for a, and then figure out the number of solutions using the rules above.
Hope this helps!
Answer:
The probablitiy that the other side is also red is 0.67 (2/3)
Step-by-step explanation:
The conditional probability of A given B is denoted as P(A|B) and has the equation:
P(A|B)= (P(A) × P(B|A)) / P(B)
the probability that getting red after picking one token and flipping, P(R),
=probability of picking two side red token and getting red +
the probability of picking one side red one side blue token and getting red
=0.5 × 1 + 0.5 × 0.5 = 0.75
P(TR|R) means the probability of picking two side red token given that token landed red and equals to:
P(TR|R) = P(TR) × P(R|TR) / P(R) = 0.5 × 1 / 0.75 =2/3 ≈ 0.67