Question

Question in the file below.

Answer 1

The distributive property states a(b+c+d) = ab + ac + ad.

$\frac{1}{2} (10x+20y+10z)=\frac{1}{2}(10x) + \frac{1}{2}(20y) + \frac{1}{2}(10z)\\\\=\boxed{\bf{5x+10y+5z}}$

Answer 2

Distributive property must be applied to simplify. 

1/2 * 10x = 5x
1/2 * 20y = 10y
1/2 * 10z = 5z

Answer:  5x + 10y + 5z