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nika2105 [10]
3 years ago
14

50 POINT QUESTION Are matrices A and B inverses?

Mathematics
2 answers:
MrRa [10]3 years ago
8 0

Answer:

Step-by-steYes, they are.

plug matrices into calculator and find the inverse.

Inverse of matrices:

plug matrix into calculator

second matrix

edit

second quit

second matrix

press A

press x^ -1

enterp explanation:

Andreyy893 years ago
4 0
Yes, they are.
plug matrices into calculator and find the inverse.
Inverse of matrices:
plug matrix into calculator
second matrix
edit
second quit
second matrix
press A
press x^ -1
enter

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Using the Multiplication Property of -1
Papessa [141]

A. -(a+5)

Because the negative sign is outside the parenthesis, multiplying by -1 just removes the negative sign:

-(a+5) * -1 = a+5


B. -(-x+31)

Apply the distributive property:

-(-x+31) becomes (- -x +31) which simplifies to (x+31)

multiply that by -1 to get -x+31


C. -(4x+12)

Because the negative sign is outside the parenthesis, multiplying by -1 just removes the negative sign:

-(4x+12) * -1 = 4x+12

7 0
3 years ago
A statistics instructor believes that fewer than 20% of Evergreen Valley College (EVC) students attended the opening night midni
Alex17521 [72]

Answer: It is believed that exactly 20% of Evergreen Valley college students attended the opening night midnight showing of the latest harry potter movie.

Step-by-step explanation:

Since we have given that

n = 84

x = 11

So, \hat{p}=\dfrac{x}{n}=\dfrac{11}{84}=0.13

p = 0.20

So, hypothesis:

H_0:p=\hat{p}\\\\H_a:\hat{p}

so, test statistic value would be

z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}\\\\z=\dfrac{0.13-0.20}{\sqrt{\dfrac{0.2\times 0.8}{84}}}\\\\z=-1.604

At 1% level of significance, critical value would be

z= 2.58

Since 2.58>-1.604

So, We will accept the null hypothesis.

Hence, It is believed that exactly 20% of Evergreen Valley college students attended the opening night midnight showing of the latest harry potter movie.

4 0
3 years ago
Read 2 more answers
I need help with this plz
jeka94

Answer:

Triangle CED

Step-by-step explanation:

C and M need to both be at the same places in their respective equations.

4 0
2 years ago
F(x)=x^2+16<br><img src="https://tex.z-dn.net/?f=f%28x%29%20%3D%20x%5E%7B2%7D%20%20%2B%2016" id="TexFormula1" title="f(x) = x^{2
deff fn [24]

f(x) =  {x}^{2}  + 16 \\  \:  \:  \:  \:  \:  \:   \:  \:  \:  \:  \: (x - 4)(x + 4) \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: x = 4 \:  \:  \:  \:  \: x =  - 4
7 0
3 years ago
Solve for x. x+139 132°
arsen [322]

Answer:


as we know that  corresponding angles are same  if two parallel line cut by Traversal opposite angle are also same

means x+139=132

so x=132-139

then x=-7


4 0
2 years ago
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