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Nastasia [14]
3 years ago
6

I need an answer to this question please

Mathematics
2 answers:
Maksim231197 [3]3 years ago
7 0
D. 5 faces, 5 vertices, 8 edges!
vekshin13 years ago
5 0
First,, let's count how many vertexes our figure has. To find this out,, we need to count how many corners the figure has. On the bottom of the figure we have 4 vertexes,, and on the top we have 1 vertex which means we have 5 total vertexes. Now lets count how many faces our figure has. Since it is a 3D shape,, we have one face on the bottom and 4 faces around the triangle. This tells us that we have 5 faces. Finally,, we can count the edges by looking at lines of our triangle. Edges are the long corner lines that lead to the tip of the triangle,, which means that we have only 4 edges. This means that we have 5 faces,, 5 vertices,, and 4 edges making the correct answer option C.
Let me know if you have any further questions.
:)
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1/-9

Step-by-step explanation:

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How do I figure this out?
Lelechka [254]

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Step-by-step explanation:

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Mai bought a television for $330. The tax rate is 8%.
erica [24]
1 % of 330 is 3.3 and 3.3x8=26.4 so 26.4+330=356.4
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6 0
3 years ago
Use a matrix equation to solve the system of linear equations. left brace Start 2 By 1 Matrix 1st Row 1st Column 2nd Row 1st Col
natali 33 [55]

Answer:

\left[\begin{array}{ccc}3&-1&\\-1&1/2\\\end{array}\right]

Step-by-step explanation:

The matrix system for the linear equations: x + 2y = 8, 2x + 6y = 9

\left[\begin{array}{ccc}1&2&\\2&6\\\end{array}\right] \left[\begin{array}{ccc}x\\y\end{array}\right] = \left[\begin{array}{ccc}8\\9\end{array}\right]

To get the coefficient of x and y, the inverse of the first matrix (let the first matrix be A) must be known.

A^{-1} = (1 / determinant of A) x Adjoint of A

the determinant of A = (1 x 6) - (2 x 2) = 6 - 4 = 2

Adjoint of A = \left[\begin{array}{ccc}6&-2&\\-2&1\\\end{array}\right]

A^{-1}= \frac{1}{2} \left[\begin{array}{ccc}6&-2\\-2&1\end{array}\right] = \left[\begin{array}{ccc}3&-1&\\-1&1/2\\\end{array}\right]

4 0
3 years ago
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