Evaluate the expression. Choose the best answer.
2 answers:
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This question looks really tricky, but it's actually just describing a system of equations. We have the equation for the speed of the boat with the current and the speed of the boat against the current. Call the boat speed b and the current speed c:
Then
So the boat's speed is 7 km/h. Find the current's speed by plugging the boat speed back into one of the original equations:
The current's speed is 6 km/h.
Then
So the boat's speed is 7 km/h. Find the current's speed by plugging the boat speed back into one of the original equations:
The current's speed is 6 km/h.