exam Maths Puzzle Numerical Ability

simplify -3a^2b^-5/b^3
a. a^2/3b^8
b. -3/a^2b^8
c. 1/3a^2b^8
d. -3a^2/b^8

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exam Other Question

I am a parent trying to help my daughter with this equation. I am not sure what I am doing incorrectly.

-4=7x-(-1)/8 When one half of the second of two consecutive integers is subtracted from the first of the two consecutive integers, the result is 2.