exam Maths Puzzle Numerical Ability

which of the following is equivalent to the rational number 4xy/5y^2?
a. 4/5
b. 4x/5y
c. 8y/12y^2
d. 4x/y

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exam Other Question

suppose f(x)=2x+5 and g(x)= -1/3x +2. Find each value.
1) 2g(7)

can someone explain this to me?
I need help on this problem.

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The clearance of the bridge is less than 12 feet.