**Answer:**

under root 2, 1.5, 2π

**Step-by-step explanation:**

under under root 2 is equals to 1.414

1.5

2×22/7

44/7

6.2

**Answer:**

Divide the diameter by 2, and use the area formula A=pi(r^2)

**Step-by-step explanation:**

**Answer:**

**Step-by-step explanation:**

2 × ( 3x + 6 )° + ( 16x + 14 )° = 180°

22x + 26 = 180

22x = 154

x = 7

This is the answer, ab-a+4

**Answer:**

Third option: x=0 and x=16

**Step-by-step explanation:**

Isolating √(2x+4): Addind √x both sides of the equation:

Squaring both sides of the equation:

Simplifying on the left side, and applying on the right side the formula:

Isolating the term with √x on the right side of the equation: Subtracting 4 and x from both sides of the equation:

Squaring both sides of the equation:

This is a quadratic equation. Equaling to zero: Subtract 16x from both sides of the equation:

Factoring: Common factor x:

x (x-16)=0

Two solutions:

1) x=0

2) x-16=0

Solving for x: Adding 16 both sides of the equation:

x-16+16=0+16

x=16

Let's prove the solutions in the orignal equation:

1) x=0:

x=0 is a solution

2) x=16

x=16 is a solution

Then the solutions are x=0 and x=16