Aconvention charges $9.00 for adults and $6.00 for children. the receipts for one hour were $618. if 80 tickets were sold in that hour, how many children and how many adults came to the convention.

goog may have it for you

(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