Answer: C) 42
There are 7 ways for the first place winner to be chosen. Once that position is locked up, there are 6 ways to have someone picked for second place (since that first place runner can't simultaneously be in both places at once)
So we have 7*6 = 42 different permutations.
The longer way to get this answer is to use the permutation formula as shown below
nPr = (n!)/(n-r)!
7P2 = (7!)/(7-2)!
7P2 = (7*6*5!)/(5!)
7P2 = 7*6 <---- note how this shows up, as we found earlier
7P2 = 42
Either way, the answer is 42
Answer:
Length = 15
Width = 6
Area = 90
Step-by-step explanation:
Area of the rectangle =
Lets factorise the polynomial
We know that Area = Length × Width
Let the length be (x + 3) & width be (x - 6)
Its given in the question that x = 12. So putting the value of x gives ,
Length =
Width =
Area = Length × Width = 15 × 6 = 90
I sure is crosses through the orgin once straight through the middle plus its linear slope of 4
Answer: 34.2
For everyone 1 kilometer=.621371 so if you times that by 55 you get 34.1754 which rounds to 34.2
If U = {a,b,c,d,e,f,g,h,i,j} A = {a,e,i} B = {b,c,d,e} Write the elements for the complement of (A u B)
Anit [1.1K]
Answer:
(f,g,h,i)
Step-by-step explanation:
(AuB)=(a,b,c,d,e,i)
(AuB) complement =(f,g,h,i)