Question

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

Answer 1

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. \( 9n + 8b + 7s - 6t = 21 \)