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lara31 [8.8K]
2 years ago
15

Is X=[−14−32] the inverse of A=[15−25310−110]?

Mathematics
2 answers:
blsea [12.9K]2 years ago
6 0

Answer:

The product of the matrices is not the identity matrix. Therefore, X and A are not inverses of each other.

Step-by-step explanation:

I took the exam.

Elis [28]2 years ago
4 0

The product of the matrices is an identity matrix. Therefore, X and A are inverse of each other.

The matrices are given as:

X = \left[\begin{array}{cc}-1&-3\\4&2\end{array}\right]

A = \left[\begin{array}{cc}\frac 15&\frac 3{10}\\-\frac 25 &-\frac 1{10}\end{array}\right]

To check the matrices are inverse, we calculate their products.

A \times X =  \left[\begin{array}{cc}\frac 15&\frac 3{10}\\-\frac 25 &-\frac 1{10}\end{array}\right] \times \left[\begin{array}{cc}-1&-3\\4&2\end{array}\right]

Multiply the rows of A by the column of X.

This gives

A \times X =  \left[\begin{array}{cc}\frac 15 \times -1 + \frac{3}{10} \times 4&\frac 15 \times -3 + \frac{3}{10} \times 2\\ -\frac 25 \times -1 - \frac{1}{10} \times 4&-\frac 25 \times -3 + -\frac{1}{10} \times 2\end{array}\right]

A \times X = \left[\begin{array}{cc}1&0\\0&1\end{array}\right]

The product of  A and X is an identity matrix.

This means that; both matrix are inverse of each other

Read more about matrix at:

brainly.com/question/4017205

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Answer:

The <em>b</em> is the y-intercept.

the <em>m</em> is the slope.

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3 years ago
Evaluate 9/g+2h+5 when g=3 and h=6
vladimir1956 [14]
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Shtirlitz [24]

Answer/Step-by-step explanation:

2. Using two pairs of values, (0, 59) and (2,000, 51),

slope (m) = \frac{y_2 - y_1}{x_2 - x_1} = \frac{51 - 59}{2,000 - 0} = \frac{-8}{2,000} = -\frac{1}{250}

3. The y-intercept is the value of y when x = 0. Thus, x = 0, when y = 59. Therefore,

y-intercept (b) = 59

4. To write an equation in slope-intercept form, simply substitute m = -¹/250, and b = 59, in y = mx + b

✅y = -\frac{1}{250}x + 59

5. Substitute x = 5,000 in y = -\frac{1}{250}x + 59.

y = -\frac{1}{250}(5,000) + 59

y = -20 + 59

y = 39

At an altitude of 5,000 ft, temperature would be 39°F

3 0
3 years ago
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Answer:

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Rounded number = 1.66 and or 1.6

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2 years ago
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