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snow_lady [41]
3 years ago
12

A polyhedron has 7 faces and 10 vertices. How many edges does it have

Mathematics
1 answer:
Serjik [45]3 years ago
5 0
EULER'S \: \: \: FORMULA \: - \\ \\ \\ For \: any \: convex \: polyhedron \: , \: the \: \\ number \: of \: vertices \: and \: faces \: \\ together \: is \: exactly \: two \: more \: than \\ \: the \: number \: of \: edges. \: \\ \\ Symbolically \: , \\ V-E+F=2 \\ \\ Here \: , \: F=7 \: \: and \: \: V=10 \\ \\ We've \: \: to \: \: find \: \: E \\  Using \: \: Euler's \: \: Formula \: \: , \\ \\ 10 - E + 7 = 2 \\ \\ \\ E \: = \: 15 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: Ans.
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Please I need help and I give brainliest thank you!!
Marysya12 [62]

Answer:

i believe it is x=4

Step-by-step explanation:

10x+7=12x-1

7=12x−1−10x

8=2x

divide

x=4

6 0
3 years ago
Please help! If possible please show your work. Thank you in advance!! :D
Rudiy27

Answer:

  • (-4)³ = -64
  • -64

Step-by-step explanation:

The first step in solving the equation is to cube both sides:

  (∛x)³ = (-4)³ . . . . . = (-4)(-4)(-4) = 16(-4) = -64

  x = -64 . . . . . simplified

__

We're not sure what "checking" is supposed to involve here. Usually, one would check the answer by seeing if a true statement is made when the answer is put into the original equation.

  ∛(-64) = -4 . . . true

Many calculators will not compute √(-64) because they compute roots using logarithms. The log of a negative number is not defined.

So, the way one would check this is to cube both sides, which is how we got the answer in the first place. We expect the same result from doing the same operation again, so it isn't really a check.

6 0
2 years ago
Can someone please help me on this one​
Hunter-Best [27]

Answer:

c

Step-by-step explanation:

7 0
3 years ago
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