exam Maths Puzzle Numerical Ability

Factor completlety 16x^2-2x-3

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exam Other Question

Find an equation of the line containing the given pair of points.
(-5, -9) and (-3, -2)

Help me please.
In my class today, we learned rates. Here is one of my problems: 55mi/h=?ft/s I have no clue what to do. I wrote out 55mi * ____ = ____ft
1 h s
What am I supposed to do next?