exam Maths Puzzle Numerical Ability

Hi i have a question on a problem on adding rational expressions.

Here it is:
7/2xy^2 + 3/8x^2y

Thanks for helping

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exam Other Question

Evaluate. (-6)(10) - 6
Can you help me understand this Write the function to show a collectable doll that has doubled in value in 10 years. The initial value of the doll was $355.00.
I think the answer is y=355(2)^x/10 . Am I correct