Answer: 7y+5
Step-by-step explanation:
Combine Like Terms:
4y+5+3y
(4y+3y)+(5)
7y+5
Answer:
y = -6x + 20
Step-by-step explanation:
Answer:
C.
Step-by-step explanation:
Trust in knowledge Young Padawan
Answer:
, 
Step-by-step explanation:
Given
A motorboat takes 5 hours to travel 200 miles upstream and 4 hours to go downstream
Suppose the speed of motorboat in still water and rate of current be x and y respectively.
during upstream

During downstream

Add (i) and (ii) we get


Thus, the speed of boat in still water is
and rate of current is 