Multiply the objects weight by .917
There are 3060 ways the club send 4 students to the next debate if there are 18 students on the debate club.
<h3>What is permutation and combination?</h3>
A permutation is the number of different ways a set can be organized; order matters in permutations, but not in combinations.
We have the total number of students = 18
The number of ways the club send 4 students to the next debate is:
= C(18, 4)

= 3060
Thus, there are 3060 ways the club send 4 students to the next debate if there are 18 students on the debate club.
Learn more about permutation and combination here:
brainly.com/question/2295036
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Answer:
The man is 27 years old.
Step-by-step explanation:
You can create a system of equations.
Let x = the age of the man
Let y = the age of his son
You can create the following equations based on what was given in the problem:
1. x = y + 18
2. (x - 3) = 4(y - 3)
You can simplify the second equation:
x - 3 = 4y - 12
x = 4y - 9
Then, solve the system of equations:
x = y + 18
-
x = 4y - 9
____________
0 = -3x + 27
The son's age is 9, therefore the father is 27 years old.
Real quick so I can sleep. it is because obtuse is over 90 degrees