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Which expression is equivalent to r-1+8r+9 ? 9r+8 9r-10 -7r+8 -7r-10

Which expression is equivalent to r−1+8r+9 r-1+8 r+9 ?\newline9r+8 9 r+8 \newline9r−10 9 r-10 \newline−7r+8 -7 r+8 \newline−7r−10 -7 r-10

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Simplify variable expressions involving like terms and the distributive propertyright chevron icon

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Q. Which expression is equivalent to r−1+8r+9 r-1+8 r+9 ?\newline9r+8 9 r+8 \newline9r−10 9 r-10 \newline−7r+8 -7 r+8 \newline−7r−10 -7 r-10
  1. = (r + 88r) + (−1-1 + 99)
  2. Add coefficients: Add the coefficients of the like terms rr and 8r8r.r+8r=1r+8r=9rr + 8r = 1r + 8r = 9r
  3. Add constants: Add the constants −1-1 and 99.\newline−1+9=8-1 + 9 = 8
  4. Combine results: Combine the results from the previous steps to get the final expression. 9r+89r + 8

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