Answer:
all u have to do is dvide
Start with -3x + 2 = -7
Subtract 2 from each side
-3x = -9
Divide each side by -3
x = 3
Use the following formula valid fo every polyhedron.
v-e+f=2
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Search for Euler characteristic, or Euler-Poicare characteristic for more depth about this formula </span>
v= number of vertices
e=number of edges
f=number of faces
<span>You get v=13
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Use the formula I = PRT.....you'll get $2000
Use photomath , its easier it tells you the steps