What’s the 84th term of the arithmetic sequence -5, 15, 35

Step-by-step explanation:

15-(-5) = 20 and 35-15=20  so d=20

your answer would be 10x - 1

(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