Respuesta :

47 should be your answer. 
41
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WORK :

Use PEMDAS

10 × 4 - 2 × (4² ÷ 4) ÷ 2 ÷ 1/2 + 9
10 x 4 - 2 x ( 4 ) 
÷ 2 ÷ 1/2 + 9
40 - 8 ÷ 2 ÷ 0.5 + 9 
40 - 4 ÷ 0.5 + 9
40 - 8 + 9
32 + 9 = 41