2 years ago

Which coefficient matrix represents a system of linear equations that has a unique solution?

2 answers:

7 0

<span>the system has a unique solution if and only if the determinant of the coefficient matrix does not equal zero. </span>

7 0

It only works when the coefficient it's not 0

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EastWind [94]

Answer:

Step-by-step explanation:

We know that the medians of the triangle divides in a ratio of 2:1. Therefore we have the equation:

$\dfrac{9x-9}{2x+8}=\dfrac{2}{1}$ <em>cross multiply</em>

$1(9x-9)=2(2x+8)$ <em>use distributive property a(b + c) = ab + ac</em>

$9x-9=(2)(2x)+(2)(8)$

$9x-9=4x+16$ <em>add 9 to both sides</em>

$9x=4x+25$ <em>subtract 4x from both sides</em>

$5x=25$ <em>divide both sides by 5</em>

$\boxed{x=5}$

$OB=9x-9\to OB=9(5)-9=45-9=\boxed{36}$

$OE=OB:2\to OE=36:2=18\to BE=BO+OE\to BE=36+18=54$

8 0

2 years ago

Trava [24]

Answer:

just look at the algebra formula and simplify to get your answer. Remember to use your powers well

8 0

1 year ago

vichka [17]

For one semester a School A-

750 + 200 = 950

For one semester at School B-
10 percent off of 1,000 is 900

School A- $950
School B- $900

3 0

3 years ago

Vaselesa [24]

Answer:

Step-by-step explanation:

that's the right answer

8 0

2 years ago

Anettt [7]

I think so I’m not pretty sure

6 0

2 years ago