Question

Which expression has a value of 15 when n = 7?

43 minus 5 n
3 n minus 5
6 n minus 28
19 minus StartFraction 28 Over n EndFraction

Answer 1

To find which expression evaluates to 15 when \( n = 7 \), we can evaluate each expression step by step.

1. **Expression: \( 43 - 5n \)**
\[
43 - 5(7) = 43 - 35 = 8
\]

2. **Expression: \( 3n - 5 \)**
\[
3(7) - 5 = 21 - 5 = 16
\]

3. **Expression: \( 6n - 28 \)**
\[
6(7) - 28 = 42 - 28 = 14
\]

4. **Expression: \( 19 - \frac{28}{n} \)**
\[
19 - \frac{28}{7} = 19 - 4 = 15
\]

From our calculations, the expression that has a value of 15 when \( n = 7 \) is:

\[
\boxed{19 - \frac{28}{n}}
\]