5.5 + 2.1x + 3.8x – 4.1

5.9x + 1.4

Step-by-step explanation:

5.5 + 2.1x + 3.8x - 4.1

= 5.9x + 1.4

1.4 + 5.9x

Step-by-step explanation:

You add like terms. Since 2.1x and 3.8x are like-terms, due to the variable x, you combine them. 5.5 and -4.1 are also like-terms because they both have no variable.

(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