Answer:
n = 5.2.
Step-by-step explanation:
-20.8 = -4n
We divide both sides of the equation by -4:
-20.8 / -4 = -4n/-4
5.2 = n (answer).
Answer: 2n
Step-by-step explanation:
Silvia is n, sister is n, total is n+n=2n.
B. -8/18 is the correct answer
To solve this, we'll use Euler's Polyhedral formula.
This formula states that in any polyhedron, the number of vertices V, faces F, and edges E, satisfy:

If we solve for the edges E, we'll get:

Using the data given,

We get that the polyhedron would have 12 edges
D because of lx w x h and you would get one cubic unit