Step-by-step explanation:

Answer: 0.09
Step-by-step explanation:
From the question, in a physical education class, there are 21 boys and 9 girls. Each day, the teacher randomly selects a team captain randomly.
The probability that the team captain will be a girl two days in a row assuming no student is absent will be:
Boys = 21
Girls = 9
Total = 21 + 9 = 30
P(pick a girl) = 9/30 = 3/10 = 0.3
P(pick a girl 2 days in a row) = (0.3)²
= 0.09
Answer: The required equation be

Step-by-step explanation:
Since we have given that
Let the number of meeting rooms a hotel has be m
Number of social chairs each meeting room has =325
So, total number of chairs m number of meeting rooms will have

Let the number of chairs be c
According to question, we get

Hence, the required equation be

Answer:
x = 6
Step-by-step explanation:
(9x - 5)° = (6x +13)°
9x - 5 = 6x + 13
9x - 6x = 13 + 5
3x = 18
x = 18/3
x = 6
The given parallelogram is a rhombus when x = 6