Question

I need the awnser for 10 please help

Answer 1

`\mathfrak{Solution : }`

The sum of two complementary angles is 90° , so

• (5x + 7)° + (8x - 21)° = 90°

• 5x + 8x + 7° - 21° = 90°

• 13x - 14 = 90°

• 13x = 90° + 14°

• 13x = 104°

• x = 104° ÷ 13

• x = 8°

1st angle :

• (5x + 7)°

• ((5×8) + 7)°

• (40 + 7)°

• 47°

2nd angle :

• (8x - 21)°

• ((8×8) - 21)°

• (64 - 21)°

• 43°