exam Maths Puzzle Numerical Ability

Find the slope and the y intercept.
10-1/4y=4x
The slope is ?
The y intercept is 0,? ?

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exam Other Question

The problem states to rationalize the denominator.

√(2- 4/z^2 + 2/z^4 )

I came up with ((z^2- 1)√2)/z^2

Does that make sense? Any help would be greatly apprec a lab is testing two high-speed trains. One train travels 40 km/h faster than the other train. While one travels 70km, the other travels 60 km. Find their speeds.

Please break it down.. thanks