Answer:
C
Step-by-step explanation:
Using the Cofunction identity
sin(90 - x)° = cos x°, hence
cos80° = sin(90 - 80)° = sin10° → C
You cannot have an answer to this because it is not an equation
Twelve men take 6 hours to finish a piece of work.
In 1 hour, the 12 men will finish 1/6 of the work
( 1 job ) / ( 6 hrs ) = ( 1/6 of a job ) / ( 1 hr )
-----------------------------------------
That means there is of the job
left to do.
-------------------
If 12 men take 6 hours to finish a piece of work,
1 man will take 12 times as long, to finish the work, so
( 1 job ) / ( 6*12 = 72 hrs ) = rate of working for 1 man, or
-------------------
After 1 hour, there are a total of men working
20 men will work 20 times as fast as 1 man on the
of a job that remains, so
Let = hours for the 20 men to finish the job
Answer:
the answer should be 50
Step-by-step explanation:
If you distribute -5 to the things in the parenthesis you would get 10k-20 which is the same as -5(-2k+4)
