What numbers add up to -9 but multiply to 8?

-8 & -1

Step-by-step explanation:

Let the numbers be x and y

x+y = -9 (1)

xy = 8 (2)

(1) x = -9-y

(2) (-9-y)y = 8

-9y-y² = 8

y²+9y+8 = 0

y²+8y+y+8 = 0

y(y+8)+1(y+8) = 0

(y+8)(y+1) = 0

y = -8 , -1

x = -9-y

If y = -8, x = -9-(-8) = -1

If y = -1, x = -9-(-1) = -8

Either ways, the numbers are -8 & -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

24

step-by-step explanation: