Help me please

Step-by-step explanation:

g(f(x))  means that we find an equation where f is a function of g. so we substitute f(x) in all x values for g, so therefore

then we simplify this equation and solve for g(f(x)).

we have multiplied by 3 the equation of f(x)

we then add or subtract like terms which are those terms that have the same variables.

step-by-step explanation:

it's is b

(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