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3 years ago

What is -8.3 - (-5.4)

Mathematics

2 answers:

Vera_Pavlovna [14]3 years ago

8 0

Answer:

Step-by-step explanation:

-11.7

A negative and a a negative will be added together

Anna007 [38]3 years ago

4 0

Answer:

$-2.9$

Step-by-step explanation:

$-8.3--5.4$

The 2 negatives cancel out and make a positive:

$-8.3+5.4$

$-2.9$

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1 year ago

PLEASE HELP QUICKLY! 20 points! I will mark best answer as Brainliest!

Alina [70]

t= 2.25 secs

Step-by-step explanation:

Step 1 :

Equation for motion with uniform acceleration is v = u+ at

where v is the final velocity

u is the initial velocity

a is the acceleration due to gravity

and t is the time

Step 2 :

Here , v = 0 because at the highest point final velocity is 0.

u = 72 feet/sec

a = -32 ft/sec^2

We need to find the time t.

Substituting in the equation we have,

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3 years ago

Tim knows the volume and base area of a wooden chest that is in the shape of a rectangular prism. If the volume is 5/24 of a cub

Leto [7]

Answer: The height of the chest is 11/24

Step-by-step explanation:

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3 years ago

What is the missing length???

Kaylis [27]

Answer:

Step-by-step explanation:

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2 years ago

[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