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yulyashka [42]
3 years ago
15

Dimitri determined that the ordered pair (2, –2) is a solution to the system of linear equations 7x + 9y = –4 and 5x – 2y = 6 as

shown.
He mixed up the coordinates of the ordered pair when substituting it into the equations 7x + 9y = –4 and 5x – 2y = 6.

He checked the equation 7x + 9y = –4 first when he should have checked first.

He made a mistake in his calculations when substituting the ordered pair into the equation 7x + 9y = –4 and simplifying.

He made a mistake in his calculations when substituting the ordered pair into the equation 5x – 2y = 6 and simplifying.
Mathematics
1 answer:
BabaBlast [244]3 years ago
4 0

Answer: D. He made a mistake in his calculations when substituting the ordered pair into the equation 5x -2y =6 and simplifying.

Step-by-step explanation: I got the answer correct on a test. Hope this helps!

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Paladinen [302]

Answer:

3 1/3 feets

Step-by-step explanation:

Given that:

Height of aquarium = 1 3/4 feets

Area of aquarium = 5 5/6 ft²

The length of aquarium = x

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Area of a rectangle = Length * width

5 5/6 = x * 1 3/4

35/6 = 7x/4

Cross multiply :

7x * 6 = 35 * 4

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3 years ago
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AysviL [449]

Answer:

the answer is D.

Step-by-step explanation:

multiply each row in the first matrix by each column in the second matrix.

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simplify each element of the matrix by multiplying out all the expressions.

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3 years ago
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Answer:

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3 years ago
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B

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3 years ago
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