Is 2(–2) + 6(2) equivalent to (–3)(–3) + (–1)(1)?

Yes

Step-by-step explanation:

2(–2) + 6(2) =

-4 + 12 =

8

(–3)(–3) + (–1)(1) =

9 + -1 =

8

8 = 8, so they are equivalent

(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