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sergeinik [125]
3 years ago
15

Consider the matrix shown below:

Mathematics
1 answer:
velikii [3]3 years ago
8 0

Answer:

A)\ \ \ \ \left[\begin{array}{ccc}8&-5\\-3&2\\\end{array}\right]

Step-by-step explanation:

Given the matrix: \left[\begin{array}{ccc}2&5\\3&8\\\end{array}\right],  it's inverse is calculated using the formula:

\left[\begin{array}{ccc}a&b\\c&d\\\end{array}\right]^{-1}=\frac{1}{det\left[\begin{array}{ccc}a&b\\c&d\\\end{array}\right] }\left[\begin{array}{ccc}d&-b\\-c&a\\\end{array}\right]

#Therefore, we calculate as;

\frac{1}{det\left[\begin{array}{ccc}2&5\\3&8\\\end{array}\right] }\left[\begin{array}{ccc}8&-5\\-3&2\\\end{array}\right] \\\\\\\\\#det\left[\begin{array}{ccc}2&5\\3&8\\\end{array}\right] =1\\\\\\\\=\frac{1}{1}\left[\begin{array}{ccc}8&-5\\-3&2\\\end{array}\right] \\\\\\\\=\left[\begin{array}{ccc}8&-5\\-3&2\\\end{array}\right]

Hence, the inverse of the matrix is \left[\begin{array}{ccc}8&-5\\-3&2\\\end{array}\right]

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Order of operation 24 - 8 ÷ 4
Nutka1998 [239]

Answer:

22

Step-by-step explanation:

Remember to follow PEMDAS (Parenthesis, Exponents (& roots), Multiplication, Division, Addition, Subtraction).

First, divide: 8/4 = 2

Next, subtract: 24 - 2 = 22

22 is your answer

~

8 0
3 years ago
Read 2 more answers
What’s the simplified expression for the expression below 7(x - 4) - 3(x + 5)
Len [333]

Answer:

4 x + -43

Step-by-step explanation:

Simplify the following:

7 (x - 4) - 3 (x + 5)

Hint: | Distribute 7 over x - 4.

7 (x - 4) = 7 x - 28:

7 x - 28 - 3 (x + 5)

Hint: | Distribute -3 over x + 5.

-3 (x + 5) = -3 x - 15:

7 x + -3 x - 15 - 28

Hint: | Group like terms in 7 x - 3 x - 28 - 15.

Grouping like terms, 7 x - 3 x - 28 - 15 = (7 x - 3 x) + (-28 - 15):

(7 x - 3 x) + (-28 - 15)

Hint: | Combine like terms in 7 x - 3 x.

7 x - 3 x = 4 x:

4 x + (-28 - 15)

Hint: | Evaluate -28 - 15.

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Answer: 4 x + -43

4 0
3 years ago
Solve and Graph the inequality on a NUMBER LINE ! (Show your work)<br><br> -7&gt;g-21
Morgarella [4.7K]

Answer:

g < 14. Draw an open point on the number line and an arrow in the left direction.

Step-by-step explanation:

Solve the inequality like an equation using inverse operations. If you divide or multiply by a negative be sure to flip the sign.

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-7 + 21 > g

14 > g

Graph the inequality by plotting an open circle on the value 14 and drawing an arrow in the the left direction for values less than 14 or g < 14.

3 0
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ikadub [295]

Hello im really thinking its yes

so yes

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2 years ago
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sladkih [1.3K]
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How this has been solved is by bringing the equations with (x) to one side and solving them and solving the other numbers on the other side..
4 0
3 years ago
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