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3 years ago

Write an augmented matrix for the following system of equations

Mathematics

1 answer:

chubhunter [2.5K]3 years ago

6 0

Just use the coefficients for each variable and put it in a matrix. Is the second question set equal to something? Because then you would put it in place as the question mark. (Did the pic come through?)
So the 3x3 matrix is made up of the coefficients and then to augment the matrix, you add another column at the end with the solutions. Good luck!

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What two numbers add to 13 but multiply to negative 12?

Phoenix [80]

9514 1404 393

Answer:

13.8654599313 and -0.8654599313

Step-by-step explanation:

If one of the numbers is x, then the other is 13-x, and their product is ...

x(13 -x) = -12

x^2 -13x = 12 . . . . multiply by -1 and simplify

x^2 -13x +6.5^2 = 12 +6.5^2 . . . . complete the square

(x -6.5)^2 = 54.25

x -6.5 = √54.25

x = 6.5 +√54.25 ≈ 13.8654599313

and the other number is ...

13 -x = 13 -13.8654599313 = -0.8654599313

The two numbers are 13.8654599313 and -0.8654599313.

3 0

3 years ago

On Monday, 408 students went on a trip to the 200 All 7

kap26 [50]

Answer:

Step-by-step explanation:

408-9 =399

399/7 =57

7 0

3 years ago

Polly's veterinarian told her a dog that weighs w kilograms needs 30w+70 calories each day to stay healthy. Polly's dog, Otis, w

Crank

Since w is 22, you substitute w with 22. 30(22) + 70 equals 730 calories

7 0

3 years ago

2/3(2x-4)=2x how do you work this please

bonufazy [111]

Answer:

x=-4

Step-by-step explanation:

4x/3-8/3=2x

4x-8=6x

2x=-8

x=-4

6 0

3 years ago

Please answer this just the answer

liubo4ka [24]

Answer: 5?

Step-by-step explanation: It says along the tops of the for walls so I'm assuming perimeter. 12+12+10+10 divided by 9.

6 0

3 years ago