Write and solve a system of equations for this question please
1 answer:
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
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fifty five hundredths is equal to 0.55
Answer:
a^(-1/2) = 1/sqrt(a) = 3
so.
sqrt(a) = 1/3
a = 1/9
12 and 3/5 hope this helped
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