((12 divided by 3)2-(18 divide by 3 to the power of 2))x(4 divided 2)

(12/3)*2-(18/3^2)*(4/2)=4

Step-by-step explanation:

12/3=4

18/3^2=2

4/2=2

(4*2)-(2*2)

  ^       ^

   8-4=4

b. x- 48 =120

step-by-step explanation:

(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