**Step-by-step explanation:**

hope it helped you:)

have a nice day!

<h2>

**Answer:**</h2>

x = 1

y = 1

<h3>

**Step-by-step explanation:**</h3>

**Substitute into one of the equations**

**Rearrange variables to the left sider of the equation**

**Combine like terms**

**Divide both sides of the equation by the coefficient of variable**

**Determine the sign for multiplication or division**

**Cross out the common factor**

**Substitute into one of the equations**

**The solution of the system is **

<em>**I hope this helps you**</em>

<em>**:)**</em>

**Answer:**

14

**Step-by-step explanation:**

x = 2, y = 4, z = 6

x (3 + z) - y

= 2 (3 + 6) - 4

= 2 (9) - 4

= 14

C. 6 pens for $6.42

Divide to find the number for one pen. then multiply

**Answer:**

**Height of the tree is 40.0 meters.**

**Step-by-step explanation:**

From ΔABC,

m∠ABC = 90°

Since, m∠ABC = m∠CBD + m∠ABD

90° = 6° + m∠ABD

m∠ABD = 90°- 6° = 84°

By triangle sum theorem in ΔABD,

m∠ABD + m∠BDA + m∠DAB = 180°

84° + 29° + m∠BDA = 180°

m∠BDA = 180° - 113°

= 67°

By sine rule in ΔABD,

h =

h = 39.98

h ≈ **40.0 meters**

Therefore, **height of the tree is 40.0 meters.**