3 years ago

Which equation has a solution of x = -5?

Mathematics

2 answers:

Leona [35]3 years ago

6 0

Answer:

A is correct I think

Step-by-step explanation:

lyudmila [28]3 years ago

3 0

The first equation has a solution of X=-5

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Dennis_Churaev [7]

B r = 178 + h;
b r + h = 676;
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3 years ago

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Harlamova29_29 [7]

Answer:

9/10

Step-by-step explanation:

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3 years ago

If A is nonsingular, then (AT )-1 =(A-1) T . (a) Verify this theorem for 2 × 2 matrices

kipiarov [429]

Answer:

Verified

Step-by-step explanation:

Let the 2x2 matrix A be in the form of:

$\left[\begin{array}{cc}a&b\\c&d\end{array}\right]$

Where det(A) = ad - bc # 0 so A is nonsingular:

Then the transposed version of A is

$A^T = \left[\begin{array}{cc}a&c\\b&d\end{array}\right]$

Then the inverted version of transposed A is

$(A^T)^{-1} = \frac{1}{ad - cb} \left[\begin{array}{cc}a&-c\\-b&d\end{array}\right]$

The inverted version of A is:

$A^{-1} = \frac{1}{ad - bc}\left[\begin{array}{cc}a&-b\\-c&d\end{array}\right]$

The transposed version of inverted A is:

$(A^{-1})^T = \frac{1}{ad - bc}\left[\begin{array}{cc}a&-c\\-b&d\end{array}\right]$

We can see that

$(A^T)^{-1} = (A^{-1})^T$

So this theorem is true for 2 x 2 matrices

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3 years ago

Please answer the question

DIA [1.3K]

Answer:

Step-by-step explanation:

If you were to plug in your variables, you would see that -6, and -7 is over 25 and the rest of your variables aren't. So, therefore your answer is J.

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3 years ago

If f(1) = 10, what is f(3)?

Alexus [3.1K]

Answer:

Step-by-step explanation:

multiply each f by the same root numeral

4 0

3 years ago