Claire and two friends went out for cake and coffee. The total cost of the
coffee was $8. If each person paid $9, what was the total cost of the cake?

The cake was 27$.

Step-by-step explanation:

There are 3 people and 9 x 3 = 27.

(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