We know that the ratio is;

The angles in a triangle add up to give 180°

We can think of there being twelve "parts" that add up to 180°

So our ratio is;

So the smallest angle is 30°

60/7 = (56 + 4)/7 = 56/7 + 4/7 = 8 4/7

**Answer:**

(8) and

(9) and

(10) ** and **

**Step-by-step explanation:**

**Given [Missing from the question]**

**Required**

Write a system of linear equations

**The solutions to this question is open and have different solutions**

**Solving (8) (-6,-2)**

**Let the equations be: x + y and 2x - y**

--- (1)

-- (2)

**So, the equations are:**

and

**Solving (9) (-12, 18)**

**Let the equations be: 3x - y and 4x + y**

**So, the equations are:**

and

**Solving (9): (2,0)**

**Let the equations be: x + y and x - y**

**So, the equations are:**

** and **

**Answer:**

=$306

**Step-by-step explanation:**

9/20*$680