Answer:

Step-by-step explanation:
we know that
The value of sine of an angle in a right triangle is equal to the opposite side of the angle divided by the hypotenuse
so

Angle A = 100 , Angle C = 100 , Angle D =80
The distributive property is a(b+c) = ab + ac or a(b-c) = ab - ac
So here are some potential answers:
8(50 + 4) = 8·50 + 8·4
8(60 - 6) = 8·60 - 8·6
I prefer the first answer
1/80 = 0.0125
1/5 = 0.2
0.0125-0.2 = -0.1875
-0.1875 = -3/16