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gtnhenbr [62]
3 years ago
14

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Mathematics
1 answer:
ankoles [38]3 years ago
3 0

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What is a11. A12. A21. A22
Ierofanga [76]

Answer:

a_{11} =-1\\a_{12} =3\\a_{21} =5\\a_{22} =3/2\\

Step-by-step explanation:

2X-\left[\begin{array}{ccc}-4&8\\2&-2\end{array}\right] =\left[\begin{array}{ccc}2&-2\\8&5\end{array}\right]\\X=\frac{1}{2} (\left[\begin{array}{ccc}-4&8\\2&-2\end{array}\right] +\left[\begin{array}{ccc}2&-2\\8&5\end{array}\right])\\X=\frac{1}{2} (\left[\begin{array}{ccc}-4+2&8-2\\2+8&-2+5\end{array}\right] )\\X=\frac{1}{2} (\left[\begin{array}{ccc}-2&6\\10&3\end{array}\right] )\\X= (\left[\begin{array}{ccc}\frac{1}{2}(-2)&\frac{1}{2}(6)\\\frac{1}{2}(10)&\frac{1}{2}(3)\end{array}\right] )\\

X= (\left[\begin{array}{ccc}-1&3\\5&3/2\end{array}\right] )

a_{11} =-1\\a_{12} =3\\a_{21} =5\\a_{22} =3/2\\

8 0
3 years ago
Look at picture plz help I’m dumb
elena-14-01-66 [18.8K]

Answer: The correct answer is D

 

Step-by-step explanation: you have to factor the polynomial


6 0
4 years ago
Tell me the answers to these questions neatly please, right which is bottling her potion would cost her $2.50 to make if you sol
Sergio039 [100]

Answer: She makes $58.50 in profit.

Step-by-step explanation:

It costs $2.50 to make each bottle

She sells each bottle for $7

2.50 * 13 = 32.5

It costs her $32.50 to make all the bottles.

7 * 13 = 91

She sells them all for $91.

91 - 32.5 = 58.5

$58.50 is the profit.

3 0
4 years ago
Read 2 more answers
It takes Joey 1/16 of an hour to write one Thank You card. How many cards can he write in 3/4 of an hour?
Naddik [55]
The answer would be 12 cards. If you convert 3/4 into 12/16, it tells you automatically that Joey made 12 cards, since it takes him 1/16 of an hour to write one.
Hope this helps!
5 0
4 years ago
Help me again please!
lesantik [10]

Answer:

B

Step-by-step explanation:

median is 26.5  Q1 is 23 Q2 is 29 the lowest is 22 and the highest is 30

7 0
3 years ago
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