Answer:
9
Step-by-step explanation:
The formula to get the area of a triangle is A=
so all you have to do is work backwards. 18x2=36. 36/4=9.
Answer:
-5 x -2 = 10
Step-by-step explanation:
- x - = +
5 x 2 = 10
Answer:
31.4 inches
Step-by-step explanation:
:))
Answer:
1287
Step-by-step explanation:
Number of people in elevator , n = 8
Number of floors, r = 6
Since they all look alike, arrangement doesn't matter, the we use combination :
(n+r-1 r - 1) = (8+6-1 C 6-1) = 13C5
Recall:
nCr = n! / (n-r)!r!
13C5 = 13! / (13-5)!5!
13C5 = 13*12*11*10*9 / 5*4*3*2*1
= 1287
