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2 years ago

Can a pyramid have rectangles as lateral faces?

2 answers:

4 0

No, it is not possible to have rectangular lateral sides. A pyramid is formed with a polygonal base (aka a base that is a polygon) and the lateral sides are triangles. The lateral sides of any pyramid are always triangles. The triangular faces all meet at the apex point, which is the highest point on the pyramid.

Side Note: The pyramids in Egypt are an example of a rectangular pyramid. This is a pyramid with a rectangular base.

mezya [45]2 years ago

3 0

Answer is no, only the base can be a rectangle

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Find a 2 × 2 nondiagonal matrix whose eigenvalues are 5 and −3, and associated eigenvectors are −1 2 and 1 1 , respectively.

mel-nik [20]

You're given the diagonal decomposition of the matrix:

$\begin{bmatrix}-1&1\\2&1\end{bmatrix}\begin{bmatrix}5&0\\0&-3\end{bmatrix}\begin{bmatrix}-1&1\\2&1\end{bmatrix}^{-1}$

Computing the product yields

$-\dfrac13\begin{bmatrix}1&8\\16&7\end{bmatrix}$

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2 years ago

5x - ( 4x - 1) = 2 <br>a. 1/9<br>b. -1<br>c. - 1/9<br>d. 1

trapecia [35]

Answer:

D: x=1

Step-by-step explanation:

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2 years ago

Read 2 more answers

Solve for x: 3 - (2x - 5) < -4(x + 2)

sattari [20]

x < -23/2

Step-by-step explanation:

you open the bracket first

LHS

3-(2x - 5)

-6x+15

RHS

-4(x+2)

=-4x-8

therefore:

-6x+15 < -4x-8

By collecting the like terms

-6x+4x < -8-15

=-2x<-23

Divide both side by -2x

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x < -23/2

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2 years ago

Read 2 more answers

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aivan3 [116]

Answer:

What do I have to do?? I don't understand

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3 years ago

$25 is 10% of what number

gogolik [260]

Answer:

$250

Step-by-step explanation:

so to find out what you are looking for just take $25 divided by .10 (which is ten percent as a decimal) to get $250

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2 years ago