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Bess [88]
3 years ago
9

I’ve been stuck can someone help

Mathematics
1 answer:
never [62]3 years ago
5 0

Answer:

(a). A_{x} = \left[\begin{array}{cc}12&-4\\66&6\end{array}\right]

Step-by-step explanation:

\left \{ {{5x-4y=12} \atop {3x+6y=66}} \right.

A = \left[\begin{array}{cc}5&-4\\3&6\end{array}\right]

A_{x} = \left[\begin{array}{cc}12&-4\\66&6\end{array}\right]

A_{y} = \left[\begin{array}{cc}5&12\\3&66\end{array}\right]

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4 years ago
Equations by substitution<br> y=3x-7; 2x+4y=14
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8 0
3 years ago
NEED HELP FAST
ASHA 777 [7]

From what you’re given, you know that , for some constant a. From that, you know that –2 + a = –b, and that –2a = b.

Multiply that second equation by –1, and then you can do some solvin’.

–2 + a = –<span>b
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–2 + a = 2<span>a
</span>–2 = a



8 0
3 years ago
6(5 – 2d) simpified
Reptile [31]
6(5-2d) = 30-12d
7 0
4 years ago
Read 2 more answers
Please its for a test
kozerog [31]

Answer:

1) I think the answer is A

2) (A), (D)  (B) Those numbers are irrational because irrational numbers  are all the real numbers which are not rational numbers, the latter being the numbers constructed from ratios of integers. (change some words please)

3) This number is irrational because irrational numbers are all the real numbers that are not rational.

4) 6/25

5) 0.875 since I can't show work, you divide 7 by 8

6) I don't know the answer, so maybe D and B ?

7) point A

8) 8.3 inches

9) I think it is the = I am not sure

10)  Irrational because it has no pattern

Step-by-step explanation:

I really hope this helps and good luck. I tried my Best!

7 0
3 years ago
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