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3 years ago

The base of this solid figure has 4 equal sides and the faces are triangels

Mathematics

2 answers:

Viefleur [7K]3 years ago

8 0

It is regular pyramid.

zhenek [66]3 years ago

6 0

It's a pyramid of square base.

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Solve the system of equations by finding the reduced row echelon form of the augmented matrix. Write the solutions for x and y i

Gwar [14]

Answer:

The solutions for the given system of equations are:

$\left \{ {{x=-5} \atop {y=12-4z}} \right.$

Step-by-step explanation:

Given the equation system:

$\left \{ {{3x+y+4z=-3} \atop {-x+y+4z=17}} \right.$

We obtain the following matrix:

$\left[\begin{array}{cccc}3&1&4&-3\\-1&1&4&17\end{array}\right]$

Step 1: Multiply the fisrt row by 1/3.

$\left[\begin{array}{cccc}1&\frac{1}{3} &\frac{4}{3}&-1\\-1&1&4&17\end{array}\right]$

Step 2: Sum the first row and the second row.

$\left[\begin{array}{cccc}1&\frac{1}{3} &\frac{4}{3}&-1\\0&\frac{4}{3} &\frac{16}{3}&16\end{array}\right]$

Step 3: Multiply the second row by 3/4.

$\left[\begin{array}{cccc}1&\frac{1}{3} &\frac{4}{3}&-1\\0&1 &4&12\end{array}\right]$

Step 4: Multiply the second row by -1/3 and sum the the first row.

$\left[\begin{array}{cccc}1&0 &0&-5\\0&1 &4&12\end{array}\right]$

The result of the reduced matrix is:

$\left \{ {{x=-5} \atop {y+4z=12}} \right.$

This is equal to:

$\left \{ {{x=-5} \atop {y=12-4z}} \right.$

These are the solutions for the system of equations in terms of z, where z can be any number.

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3 years ago

If it’s true or false

Anvisha [2.4K]

Answer:

Step-by-step explanation:

True

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4 years ago

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zhuklara [117]

Answer:

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3 years ago

Eva, David and Joshua gather and shell 2 1/2 pounds, 4 3/8 pounds and 3.25 pounds how many pounds would each person she'll?

Andreyy89

I dont know how to this but you probably make 4 3/8 and 2 1/2 into a decimal add all them together...

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3 years ago

Why do we have to change an improper fraction to a mixed fraction

pogonyaev

Answer:

My I don't know it is stupied!

Step-by-step explanation:

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4 years ago

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