exam Maths Puzzle Numerical Ability

how would I solve for f1 in an equation that is V=speed(f1-f0)/(f1+f0). what is the equation for f1

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exam Other Question

how do you solve:

write a verbal expression for each algebraic expression.

a^3 X b^3

2x^3 - 3

6k^3
----
5

^ is like a the the 3rd power
X is multiply.
-5x(x + 2y - 7)