exam Maths Puzzle Numerical Ability

Rewrite the equation given in Problem 18 to be a function of x. As it turns out, this is very much like Part (b) of Example 4 on p. 656!

18) -3x + 4y = 11

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exam Other Question

I need some help with simplifying the following:

1/2y^2 + 6/8y^3

I come up with the following answer:

1/2y^2 + 3/256

Is this correct? 4b+5/2b+1= 6b+1/3b-1 (solve the following rational equation by finding the lowest common denominator)