To find out how much money Jacqueline will earn this week from her two part-time jobs, we can use the formula given:
\[ \text{Total Earnings} = 15l + 12s \]
We need to evaluate this expression for \( l = 5 \) and \( s = 7 \).
Substituting the values into the equation:
\[ \text{Total Earnings} = 15(5) + 12(7) \]
Calculating each term separately:
\[ 15(5) = 75 \] \[ 12(7) = 84 \]
Now, adding these two amounts together:
\[ \text{Total Earnings} = 75 + 84 = 159 \]
Therefore, Jacqueline will earn $159 this week from her two jobs.