A. 42
JN, which is the whole line, equals 78. We learned that JK, KL, and MN are all equal, and that LM equals three points.
So, there are 6 parts to the line in total. Dividing 78 by 6 gives you 13 for a sixth of the line.
Now, to find LN all you have to do is know that LM is 13 times three. And just add one more 13 from MN.
13 x 4 = 42 as your answer. I hope you were able to follow my explanation lol
Answer:
-5, -1
Step-by-step explanation:
V - the crew rowing rate,
u - rate of the current.
Downstream: v + u = 13.5/1.5 = 9 mph
Upstream : v - u = 13.5/4.5 = 3 mph
u = 9 - v
v - ( 9 - v ) = 3
v - 9 + v = 3
2 v = 12
v = 6 mph, u = 9 - 6 = 3 mph
Answer: the crew`s rowing rate is 6 mph and the rate of the current is 3 mph.
-2x^4+x^2-x-9+x^4-x^3-5x+3
-x^4-x^3+x^2-6x-6