Kak,,tolong bantuin​

Jawaban:

<BQC = 44⁰

Penjelasan dengan langkah-langkah:

sudut pelurus 180⁰ , penyiku 90⁰

<AQC + <BQC = 90⁰

(6x + 4)⁰ + (5x + 9)⁰ = 90⁰

11x + 13⁰ = 90⁰

11x = 77⁰

x = 7⁰

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<BQC = (5x + 9)⁰ = 5(7)⁰ + 9 = 35⁰ + 9 = 44⁰