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3 years ago

The graph shows the density of a substance. Find the density in kilograms per liter. PLEASE HELP

Mathematics

1 answer:

Mandarinka [93]3 years ago

3 0

Answer:

for every liter it is 1/2 kilograms

Step-by-step explanation:

IF YOU GIVE ME A BRAIN LI

I WILL GIVE YOU THESE

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Find x!!! pls fast !! see photo for question

vazorg [7]

I believe that the answer would be 45

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3 years ago

If I had seven stones and I threw 8 how many stones do I have left??

igomit [66]

It is impossible as 8 is bigger than 7 and you can’t take it away ur welcome

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3 years ago

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[10] In the following given system, determine a matrix A and vector b so that the system can be represented as a matrix equation

irina1246 [14]

Answer:

$y=-\frac{158}{579}$

Step-by-step explanation:

To find the matrix A, took all the numeric coefficient of the variables, the first column is for x, the second column for y, the third column for z and the last column for w:

$A=\left[\begin{array}{cccc}1&1&2&2\\-7&-3&5&-8\\4&1&1&1\\3&7&-1&1\end{array}\right]$

And the vector B is formed with the solution of each equation of the system: $b=\left[\begin{array}{c}3\\-3\\6\\1\end{array}\right]$

To apply the Cramer's rule, take the matrix A and replace the column assigned to the variable that you need to solve with the vector b, in this case, that would be the second column. This new matrix is going to be called $A_{2}$ .

$A_{2}=\left[\begin{array}{cccc}1&3&2&2\\-7&-3&5&-8\\4&6&1&1\\3&1&-1&1\end{array}\right]$

The value of y using Cramer's rule is:

$y=\frac{det(A_{2}) }{det(A)}$

Find the value of the determinant of each matrix, and divide:

$y==\frac{\left|\begin{array}{cccc}1&3&2&2\\-7&-3&5&-8\\4&6&1&1\\3&1&-1&1\end{array}\right|}{\left|\begin{array}{cccc}1&1&2&2\\-7&-3&5&-8\\4&1&1&1\\3&7&-1&1\end{array}\right|} =\frac{158}{-579}$

$y=-\frac{158}{579}$

7 0

3 years ago

HELPPPPPPP PLEASEEEE PLEASEEEEEEE

kondor19780726 [428]

Answer:

1. Exact Form: 71/28 Mixed Number Form: 2 15/28

2. Exact Form: 27/10 Mixed Number Form: 2 7/10

3. Exact Form: 5/6

4. Exact Form: 5/4 Mixed Number Form: 1 1/4

5. Exact Form: 25/12 Mixed Number Form: 2 1/2

Step-by-step explanation:

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Show all work <br> Find exact value of x

Illusion [34]

Answer:

129 is x

Step-by-step explanation:

Your equation would be like this x= 45 + 6=180 (180 because the sum of the angle measures in a triangle is 180 always)

so once you add 45+6 =51 the equation is now x=51=180 so you subtract 51 from both sides so it equals as this x=51=180

x =-51= -51

x= 129

5 0

3 years ago