The image shows two algebraic questions, and part (a) has already been solved, with the answer provided as 11. Let's go through the steps for both parts:

a) Find the value of $2x + y$ when $x = 4$ and $y = 3$

1. Substitute $x = 4$ and $y = 3$ into the expression: $2x + y = 2(4) + 3 = 8 + 3 = 11$ The answer for part (a) is indeed 11, which has been correctly provided.

b) Find the value of $a^2 + b$ when $a = -2$ and $b = 5$

1. Substitute $a = -2$ and $b = 5$ into the expression: $a^2 + b = (-2)^2 + 5 = 4 + 5 = 9$ So, the answer for part (b) is 9.

Let me know if you would like more details or have any questions! Here are five related questions to practice:

1. Find the value of $3x + 4y$ when $x = 2$ and $y = 1$.
2. Find the value of $x^2 + 2y$ when $x = -3$ and $y = 4$.
3. Find the value of $5a - 2b$ when $a = 1$ and $b = -1$.
4. Find the value of $2p^2 + q$ when $p = 3$ and $q = 7$.
5. Find the value of $3m + n^2$ when $m = 0$ and $n = 5$.

Tip: Always check whether negative signs are inside or outside parentheses, especially when squaring numbers.