Obtuse angle................................
Answer:
can you comment me the question...you havent wrote it well enough to understand...if you do...i will answer u right now.
Yes, indeed it does equal a whole number. 45/5 equals 9, which is a whole number. Whole numbers are numbers that you count up from and including 0 (0,1,2,3,4,5,6...)
You get 9 because 45/5 is the same as 45 divided by 5 which is 9.
D=rt
c=speed of current
r=speed in still water
t=time
d=72
72=3(r+c)
72=4(r-c)
expand
divide top equation by 3 and bottom by 4
24=r+c
18=r-c
add them equations
42=2r+0c
42=2r
divide both sides by 2
21=r
sub back
18=r-c
18=21-c
minus 21 both sides
-3=-c
3=c
speed of current is 3
speed of ship is 21
