Answer:
F(x) = 44
Step-by-step explanation:
f(x) = 6x - 4
x = 8
f(x) = 6(8) - 4
f(x) = 48 - 4
Answer:
2
Step-by-step explanation:
6a+15+5a-10
11a+5 is the answer :D
mutiply 3 to 2a and 5 / 5 to a and -2 you will get 6a+15+5a-10 then 6a+5a and 15-10 would be 11a+5
sorry I'm not good at explaining, ask me if you got a question. :D
Answer:
Speed of boat in still water is 6km/h
Speed of current is 4km/h
Step-by-step explanation:
We know speed = distance / time
Let the speed of boat in still water be x
Let the speed of current be y
Hence the speed of boat, down stream = 
Distance downstream = 20km
Time taken = 2 hours
We have

......(1)
Speed of boat upstream = 
Distance upstream = 4
Time taken = 2
We have

...(2)
Adding (1) & (2)


Substituting in (1) we get

Obtuse since one angle is greater than 90 and in an obtuse triangle only one angle is needed to be greater than 90 degrees. It is also scalene