10 points + brainiest to whoever answers my questions first (no guessing )
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An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29