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3 years ago

Does the given matrix, A, have an inverse? If it does, what is A-1?

Mathematics

1 answer:

ololo11 [35]3 years ago

6 0

Answer:

yes he does

Step-by-step explanation:

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Please solve its URGENT

ZanzabumX [31]

The answer is X= -25

7 0

3 years ago

Jillian is using integer tiles to add 7 + (negative 2). She uses the steps below. Step 1 7 positive tiles. Step 2 7 positive til

raketka [301]

Answer:

Step-by-step explanation:

Given the expression 7+(-2)

Let 7 be 7 positive tiles since it is a positive number

Let -2 be 2 negative tiles being a negative number

7+(-2) = 7 positive tiles and 2 negative tiles

note that + * - will give minus sigh (-), the expression will become:

7+(-2) = 7-2

7-2 = 5

Hence the expression gives 5 positive tiles not 2 positive tiles according to Jillian calculations in step 4.

Hence Jillian made an error in step 4

7 0

3 years ago

Read 2 more answers

Who answers this correctly with (explanation) gets vevmo'd/pay pal $40.

Dovator [93]

I think its 120 degree clockwise about point A and keep your money.

5 0

3 years ago

A researcher collects data on the number of times race horses are raced during their careers. The veterinarian finds that the av

vesna_86 [32]

Answer:

95% confidence for µ, the average number of times a horse races

(12.493 , 18.107)

Step-by-step explanation:

Explanation:-

The veterinarian finds that the average number of races a horse enters is 15.3

The mean of the sample x⁻ = 15.3

Given standard deviation of the sample 'S' = 6.8

Given sample size 'n' = 25

Degrees of freedom = n-1 =25-1 =24

The tabulated value 't' = 2.064 at two tailed test 0.95 level of significance

95% confidence for µ, the average number of times a horse races

$(x^{-} - t_{\alpha } \frac{S}{\sqrt{n} } , x^{-} + t_{\alpha }\frac{S}{\sqrt{n} } )$

$(15.3- 2.064 \frac{6.8}{\sqrt{25} } , 15.3 + 2.064\frac{6.8}{\sqrt{25} } )$

(15.3 - 2.80704 ,15.3 +2.80704)

(12.493 , 18.107)

Conclusion:-

95% confidence for µ, the average number of times a horse races

(12.493 , 18.107)

3 0

3 years ago

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!! I CANNOT RETAKE THIS!!

cupoosta [38]

$x = \frac{ - b \pm \sqrt{ {b}^{2} - 4ac} }{2a} \\ \\ x = \frac{8 \pm \sqrt{ {8}^{2} - 4 \times 2 \times 5 } }{2 \times 2}$

$x = \frac{8 \pm \sqrt{24} }{4} \\ \\ x = \frac{8 \pm2 \sqrt{6} }{4}$

$x = 2 \pm \frac{ \sqrt{6} }{2} \\ \\ x = 2 \pm \sqrt{1.5} \\ \\ x = 2 + \sqrt{1.5} \: \: and \: \: \: 2 - \sqrt{1.5}$

$\textbf{\red{Your answers are correct.}}$

8 0

3 years ago