The first expression, 12C3, is the right answer. There is no limitation saying that the team must be made up of one student from each year level. Furthermore, no distinction has been made among the three players (no assignments of Boards 1, 2, or 3), as the question just asks how many different groups. Since order does not matter, this is a combination. (If order mattered, this would be a permutation).
Answer:
140
Step-by-step explanation:
Answer:
it would be the the third one an=-17+4(n-1)
Step-by-step explanation:
i don't know the step by step explanation but if you were to like plug in, it checks.
Answer:
x = 0, 9/25
Step-by-step explanation:
25x² = 9x
25x² - 9x = 0
x(25x - 9) = 0
x = 0
25x - 9 = 0
x = 9/25
Answer:
2.8
Step-by-step explanation:
15.3-12.5
When you have a positive and negative, you subtract and keep the sign of the larger number.