exam Maths Puzzle Numerical Ability

Multiply and simplify by factoring. Assume that all expressions under radicals represent nonnegative numbers.

root (3, y^4) root (3, 81y^5)

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exam Other Question

Solve the equation by expressing each side as a power of the same base and then equating exponents.
3^(6 - 3x) =1/27

a. {9}

b. {1/9}

c. {-3}
d. {3}
Having trouble solving: 2k+ar=r-3y solve for r