exam Maths Puzzle Numerical Ability

Solve for the indicated variable:

3x +4y=-2 FOR y

y = mx + b FOR m

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exam Other Question

How do you graph the linear equation 6x-5y=18? An airplane flew for 4 hours with a 20-km/h tail wind. The return flight against the same wind took 5 hours. Find the speed of the plane in still air.
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