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Maths Puzzle
Numerical Ability
please help me with this problem .
Find (a)the directrix (b)the focus and (c)the roots of the parabola y=x^2-5x+4 (x^2 is x squared) thanks
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book Other Question
the speed of a boat in still water is 24 mph. if the boat travels 54 miles upstream in the same time it takes to travel 90 miles downstream, find the speed of the current.
The slope-intercept equation of the line through the points (7.1,-8.3) and (-2.5,6.7) is y=mx+b.
Where m= 15/-9.6 and b=?