exam Maths Puzzle Numerical Ability

divide and simplify

x-7 (x+5)(x-7)
--------/---------------
9(2x-1) 6x(x+5)

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exam Other Question

Can you help me with this? 12y^2-1=44(1-y)
I tried this
12y^2-1=44-44y [44+1=45]
12y^2=43-44y
12y=
How do I solve for t (time ) in the following equation. This is from a college physics book

y = initial velocity x time + 1/2 (acceleration) time ^2


-1.69 m = (1094 m/s )t + 1/2 ( -9.8 m/s^2 ) t ^2