Let b and s be the velocity of the boat and stream respectively....
3(b-s)=27
b-s=9
b=9+s we will use this in the second equation....
2(b+s)=30
b+s=15, now use b found above in this to get:
9+s+s=15
2s+9=15
2s=6
s=3, and since from earlier b-s=9, b=9+s so
b=12
So the speed of the boat is 12mph and the stream is 3 mph
The identity property of addition states that a + 0 = a
Your answer is identity property of addition.
Answer:
228.6
Step-by-step explanation:
The units (-3,-1) and (-0,-0) are the following units located at (-4,-2).