exam Maths Puzzle Numerical Ability

please help. factor the expression 16x^2-12x-10 thanks for the help

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exam Other Question

A motorboat can go 8 miles downstream on a river in 10 minutes. It takes 30 minutes for this boat to go back upstream the same 8 miles. Find the speed of the boat in still water. {A, B, C, D} AND P(A) = 0.1, P(B) = 0.3, P(C) = 0.4, P({A,C})=

a. 0.4
b. 0.5
c. 0.6
d. 0.8