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s = 2 b = 5 t = 7 n = 1

s+2b
5b+n
7t−2s
tb
tn−1
20s−b
tn+sb
5t−b−2s
nbt−s
12s−2bt+101
9n+8b+7s−6t

1 answer

Let's calculate the values of each expression using the values provided:

  • \( s = 2 \)
  • \( b = 5 \)
  • \( t = 7 \)
  • \( n = 1 \)

  1. \( s + 2b \) \[ s + 2b = 2 + 2 \times 5 = 2 + 10 = 12 \]

  2. \( 5b + n \) \[ 5b + n = 5 \times 5 + 1 = 25 + 1 = 26 \]

  3. \( 7t - 2s \) \[ 7t - 2s = 7 \times 7 - 2 \times 2 = 49 - 4 = 45 \]

  4. \( tb \) \[ tb = t \times b = 7 \times 5 = 35 \]

  5. \( tn - 1 \) \[ tn - 1 = t \times n - 1 = 7 \times 1 - 1 = 7 - 1 = 6 \]

  6. \( 20s - b \) \[ 20s - b = 20 \times 2 - 5 = 40 - 5 = 35 \]

  7. \( tn + sb \) \[ tn + sb = t \times n + s \times b = 7 \times 1 + 2 \times 5 = 7 + 10 = 17 \]

  8. \( 5t - b - 2s \) \[ 5t - b - 2s = 5 \times 7 - 5 - 2 \times 2 = 35 - 5 - 4 = 26 \]

  9. \( nbt - s \) \[ nbt - s = n \times b \times t - s = 1 \times 5 \times 7 - 2 = 35 - 2 = 33 \]

  10. \( 12s - 2bt + 101 \) \[ 12s - 2bt + 101 = 12 \times 2 - 2 \times 5 \times 7 + 101 = 24 - 70 + 101 = 55 \]

  11. \( 9n + 8b + 7s - 6t \) \[ 9n + 8b + 7s - 6t = 9 \times 1 + 8 \times 5 + 7 \times 2 - 6 \times 7 = 9 + 40 + 14 - 42 = 21 \]

To summarize:

  1. \( s + 2b = 12 \)
  2. \( 5b + n = 26 \)
  3. \( 7t - 2s = 45 \)
  4. \( tb = 35 \)
  5. \( tn - 1 = 6 \)
  6. \( 20s - b = 35 \)
  7. \( tn + sb = 17 \)
  8. \( 5t - b - 2s = 26 \)
  9. \( nbt - s = 33 \)
  10. \( 12s - 2bt + 101 = 55 \)
  11. \( 9n + 8b + 7s - 6t = 21 \)