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morpeh [17]
3 years ago
5

Elizabeth is mowing lawns in her neighborhood to earn spending money. She can mow about 1/3 of a lawn in 20 minutes. What is her

unit rate in launch per hour?(explain how you got your answer)
Mathematics
1 answer:
Savatey [412]3 years ago
8 0
What i think the answer is 6.66 because u multiply 1/3 by 20 

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How many edges does a polyhedron with 28 faces and 40 vertices have calculator?
emmasim [6.3K]
Hey user!

your answer is here..

we know about EULER'S FORMULA, it is a formula used to verify a polyhedron or to calculate the number of faces, vertices or edges.

Euler's formula = F + V - E = 2

given :-

faces = 28, verticies = 50 and edge = ?

we know that F + V - E = 2

therefore 28 + 40 - E = 2

==> 68 - E = 2

==> - E = 2 - 68

==> - E = - 66

==> E = 66

hence, the number of edges of the polyhedron is 66.

cheers!!
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let's recall that in an isosceles triangle, the twin sides make twin angles at the bottom/base, so on the triangle on the left-side, if the "vertex" atop has an angle of 116°, then the twin sides below are simply 180° - 116 = 64, split that in half and that's 32° each.

The same is true for the isosceles triangle on the right side.  Also recall that a flat-line is always 180°, 32 + 72 + 76 = 180.

Check the picture below.

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Answer:

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Step-by-step explanation:

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