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Maths Puzzle
Numerical Ability
solve by using the quadratic formula
9x^2-270=0
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book Other Question
Find the value of a if the points whose coordinates are given are the indicated distance apart.
(-2,-5)(a,7);d=13
I'm not quite sure what this is asking, or how to solve it.
From a point on a river, 2 boats are driven in opposite directions, one at 6mph and the other at 11mph. how many hours till there 51 miles apart>?