30 pts! simplify each expression. give your answer using positive exponents. 1: 8^-2 2: 1/3^-3 3: 6^-12 * 6^8 * 6^0

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John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11

Can some one me with these questions