exam Maths Puzzle Numerical Ability

what would the equation be for the linear function of the speed of a car?

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exam Other Question

If ship is anchored at origin of 3 dim. coordinate sys. and 2 probes are sent below the surface, 1st probe stops at (-8, -4, 6) and 2nd probe stops at
(4, -9, -2) which probe is farather from the ship?
what is 5p/7-18=-43:
thank you