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The width of a rectangle measures 
(10 g-7) centimeters, and its length measures 
(g-9) centimeters. Which expression represents the perimeter, in centimeters, of the rectangle?

3g-8

-32+22 g

6g-16

11 g-16

The width of a rectangle measures (10g7) (10 g-7) centimeters, and its length measures (g9) (g-9) centimeters. Which expression represents the perimeter, in centimeters, of the rectangle?\newline3g8 3 g-8 \newline32+22g -32+22 g \newline6g16 6 g-16 \newline11g16 11 g-16

Full solution

Q. The width of a rectangle measures (10g7) (10 g-7) centimeters, and its length measures (g9) (g-9) centimeters. Which expression represents the perimeter, in centimeters, of the rectangle?\newline3g8 3 g-8 \newline32+22g -32+22 g \newline6g16 6 g-16 \newline11g16 11 g-16
  1. Perimeter Formula: To find the perimeter of a rectangle, we need to add together the lengths of all four sides. The formula for the perimeter PP of a rectangle is P=2×(width+length)P = 2 \times (\text{width} + \text{length}).
  2. Substitute Given Expressions: First, let's substitute the given expressions for the width and length into the perimeter formula:\newlineP=2×((10g7)+(g9))P = 2 \times ((10g - 7) + (g - 9))
  3. Simplify Inside Parentheses: Now, we simplify the expression inside the parentheses:\newline(10g7)+(g9)=10g+g79(10g - 7) + (g - 9) = 10g + g - 7 - 9
  4. Combine Like Terms: Combine like terms:\newline10g+g=11g10g + g = 11g\newline79=16-7 - 9 = -16\newlineSo, (10g7)+(g9)(10g - 7) + (g - 9) simplifies to 11g1611g - 16
  5. Multiply by 22: Now, multiply this expression by 22 to find the perimeter:\newlineP=2×(11g16)P = 2 \times (11g - 16)
  6. Distribute the 22: Distribute the 22 into the expression:\newlineP=2×11g2×16P = 2 \times 11g - 2 \times 16
  7. Perform Multiplication: Perform the multiplication: P=22g32P = 22g - 32

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