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sleet_krkn [62]
4 years ago
8

Mario’s company makes unusually shaped imitation gemstones. One gemstone had 10 faces and 12 vertices. How many edges did the ge

mstone have?
Mathematics
2 answers:
Evgen [1.6K]4 years ago
8 0
20 edges 
F=12, V=10
V -E+F=2
10-E+12=2
-E+22=2
-E=-20
E=20
tamaranim1 [39]4 years ago
4 0

The answer would be 20 edges.

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tangare [24]

Answer: John has 52 marbles in his collection

Step-by-step explanation:

Step 1

LET The number of marbles in John's collection can be represented by x.  The and the number of marbles in Erica  collection can be represented as =4x+ 10

The total number of marbles in both collections is 270 such that the expression to solve the equation will be

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Step 2--- solving

X + 4X+ 10= 270

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John has 52 marbles in his collection

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