Is (7, 1) a solution to this system of equations?

8x + 7y = 8
x + y = 8

8x+7y =8P

x + y =8q

multiplying 8 by q

we have

8x+8y = 64R

8x+7y=8P

8x+8y=64R Substracting R from P

-y = -56

y=56

putting the value of y in eq q

x+56=8

x=8-56

x= -48

(x,y)=( -48,56)

no solution (7,1)

(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

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1