We have
1G = 12.05 - 3D;
Then,
2D + 3( 12.05 - 3D) = 15.50;
2D + 36.15 - 9D = 15.50;
- 7D = - 20.65;
D = 2.95;
Finally, G = 12.05 - 3 x 2.95;
G = 3.20;
I think its 8 im not sure but i have the same paper and she marked mine right
Answer: 21:84
Explanation:
84-63=21, and then just do 21:84 lol
Expressed in scientific notation the answer would be 3.05 X 10^6
