Many questions 3- 5 answer

Question 3:

Step 1: Start with the equation.

$2x + 5 = 11$

Step 2: Subtract 5 from both sides.

$2x + 5 - 5 = 11 - 5$

$2x = 6$

Step 3: Divide both sides by 2.

$\frac{2x}{2} = \frac{6}{2}$

$x = 3$

**Final answer: 3

Question 4:

Step 1: Simplify each square root.

$\sqrt{16} = 4$

$\sqrt{9} = 3$

Step 2: Add the results.

$4 + 3 = 7$

**Final answer: 7

Question 5:

Step 1: Formula for area of a circle.

$A = \pi r^{2}$

Step 2: Substitute $r = 7$ cm.

$A = \pi (7)^{2}$

$A = \pi \times 49$

$A = 49\pi$ cm²

**Final answer: 49\pi cm²