1. The problem involves evaluating and simplifying given expressions and understanding the function $y = \frac{7}{5}$. 2. First, evaluate $q(15) = 30 - 9$. Simplify: $$q(15) = 21$$ 3. Next, consider the expression $pq(7) + 8$. Since $p$ and $q$ are not explicitly defined for 7, we cannot simplify further without more information. 4. Evaluate $p(c) = 24 - 18$. Simplify: $$p(c) = 6$$ 5. Evaluate $q(15) - 5$. Using the previous result for $q(15)$: $$21 - 5 = 16$$ 6. Simplify $15 - 8$: $$7$$ 7. Simplify $20 - 3$: $$17$$ 8. The function given is $y = \frac{7}{5}$, which is a constant function. Summary: We evaluated the expressions where possible and identified the constant function $y = \frac{7}{5}$.