Answer: 19
Step-by-step explanation:
To find the value of \( P \) when \( t = 4 \) and \( u = -3 \), substitute these values into the given equation:
\[ P = 7t + 3u \]
Substituting \( t = 4 \) and \( u = -3 \):
\[ P = 7(4) + 3(-3) \]
\[ P = 28 - 9 \]
\[ P = 19 \]
So, when \( t = 4 \) and \( u = -3 \), \( P \) is 19.
