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sukhopar [10]
3 years ago
8

Which ordered pair (a,b) is a solution to the given system of linear equations.

Mathematics
2 answers:
Readme [11.4K]3 years ago
7 0

Answer:

A

Step-by-step explanation:

egoroff_w [7]3 years ago
6 0

Answer:

A. (-13,-3)

Step-by-step explanation:

Solve the system of two equations:

\left\{\begin{array}{l}-2a+3b=14\\a-4b=3\end{array}\right.

From the second equation:

a=3+4b

Substitute it into the first equation:

-2(3+4b)+3b=14\\ \\-6-8b+3b=14\\ \\-8b+3b=14+6\\ \\-5b=20\\ \\5b=-20\\ \\b=-4

So,

a=3+4b=3+4\cdot (-4)=3-16=-13

The solution is (-13,-4)

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irina1246 [14]

Answer:

19.5

Step-by-step explanation:

Here is a key factors in triangles, it must add up to 180 degrees.

You have three angles in a triangle ABC,

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In this case you would add the two together (160.5) and subtract from 180 giving you the angle C = 19.5

CHECK:

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