ANSWER
No 3. x = 41 degrees
No 4. x = 6.5 degrees
Step-by-step explanation
Question 3
Note: One of the angles in a right triangle is 90 degrees. As a result, the sum of the other two angles is 90.
That is:
![\begin{gathered} 45+(x+4)=90 \\ x+4=90-45 \\ x=45-4 \\ x=41^0 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/high-school/k4422g6q8gfuivfezeokmasi204lscon7u.png)
Question 4
Note: The sum of angles in a triangle is 180
That is:
![\begin{gathered} 31+97+8x=180 \\ 128+8x=180 \\ 8x=180-128 \\ 8x=52 \\ x=(52)/(8) \\ x=6.5^0 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/high-school/hmkqz0dk7n786ey8h7un7sfovse1mhmee1.png)