Determine which operation is needed in the blank so that the expression simplifies to 25. 40_10_4_(8_2_3)_5^2

÷ - × ÷ - +

Step-by-step explanation:

40 ÷ 10 - 4 × (8 ÷ 2 - 3) + 5^2

(sin 42)/31. = sinx)/37

sinx = 37 (sin42)/31

= 37× 0.66/31 = 0.787

x= 51.9

other angle opposite to y = 180-51.9-42

= 180- 93.9 =86.1

so

sin42)/31 = sin 86.1)/y

0.021 = 0.997 /y

y= 0.997/0.021 =47.47

step-by-step explanation:

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