**Answer:**

78

**Step-by-step explanation:**

Since 13 is a prime, the least common multiple of it and 6 is their product. 6*13=78. Hope this helps!

**Answer:**

64

**Step-by-step explanation:**

diy

50 x (1/5) = 10

50 - 10 = $40 sale price

**Answer:**

166.72

**Step-by-step explanation:**

A= 2(wl+hl+hw)

A= 2(3.2×8.5+4.8×8.5+4.8×3.2)

A= 2(27.2+40.8+15.36)

A= 2(83.36)

A= 2×83.36

A= 166.72

**Answer:**

**Step-by-step explanation:**

7) ∠1 + 30 = 180 {linear pair}

∠1 = 180 - 30

**∠1 = 150**

8) ∠2 = 30 {Vertically opposite angles are congruent}

9) In ΔLMN,

∠L + ∠N + ∠M = 180 {angle sum property of triangle}

50 + 30 + ∠M = 180

80 + ∠M = 180

∠M = 180 - 80

**∠M = 100°**

**10)** Sum of exterior angle of a triangle equals to sum of opposite interior angles.

∠B + ∠A = ∠BCD

30 + ∠A = 80

∠A = 80 - 30

**∠A = 50**