Question

Help i really dont understand this :')

btw its X + 15 not 25 i messed up

Answer 1

See below ↓↓↓

Explanation:

• ∠ABC and ∠CBD are complementary
• ⇒ ∠ABC + ∠CBD = 90°
• ⇒ 4x + 25 + x + 15 = 90
• ⇒ 5x + 40 = 90
• ⇒ 5x = 50
• ⇒ x = 10

• ∠ABC = 4x + 25
• ∠ABC = 4(10) + 25
• ∠ABC = 65°

• ∠CBD = x + 15
• ∠CBD = 10 + 15
• ∠CBD = 25°

Answer 2

x = 10°

ABC = 65°

CBD = 25°

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Both the angles lie inside of right angle triangle whose interior angle sums up to total 90°

Solve for x :

• 4(x) + 25 + x + 15° = 90°

• 4(x) + x + 25 + 15 = 90°

• 5(x) + 40° = 90°

• 5(x) = 90° - 40°

• 5(x) = 50°

• x = 10°

====================

• ABC = 4(x) + 25 = 4(10) + 25 = 65°

• CBD = x + 15° = 10 + 15° = 25°