Im gonna take an educated guess on this. for the first part only one element has an outershell filled completely. but if they want two elements put chlorine. to lose electrons is probably helium to gain is magnesium. and the last one is lithium and helium because they're small and don't have allot of atomic mass
Answer:
<u>Shape representation</u>
Yellow = 1 whole unit
Blue = 1/3
Red = 1/2
Green = 1/6
1) see attachment
2) 7 1/2s in 3 1/2
8 1/3s in 2 2/3
4 1/6ths in 2/3
Answer:
82
Step-by-step explanation:
f(x) = 5x - 3
g(x) = 2x + 9
f(g(x)) = 5 (2x + 9) - 3 ..... replace x with g(x)
f(g(4)) = 5 * (2 * 4 + 9) -3 = 85 - 3 = 82
Answer: x=12
Step-by-step explanation:

The sum of the angles of the triangle is 180°:

Divide both parts of the equation by 4:

Answer:
20.8
Step-by-step explanation:
The first step you need to do is to subtract 11:
52.6 - 11 = 41.6
The second step is to divide it by 2:
41.6 / 2 = 20.8
Mark was thinking of 20.8