3 years ago

7x ( 3 x 4) = ( 7 x 3) x4

Mathematics

1 answer:

WARRIOR [948]3 years ago

4 0

Commutative, because no matter how you group the equation you will still get to same answer

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If ON= 5x - 7, LM = 4x+ 4, NM = x -7, and OL =3y-4, find the values of c and y for which LMNO MUST BE a parallelogram.

Sholpan [36]

Answer:

x=11, y=8/3

Step-by-step explanation:

Consider quadrilateral LMNO. If this quadrilateral MUST BE a parallelogram, then

LM=NO

and

LO=MN

Thus,

$\left\{\begin{array}{l}4x+4=5x-7\\ \\x-7=3y-4\end{array}\right.$

Solve this system of two equations. From the first equation:

$4x-5x=-7-4\\ \\-x=-11\\ \\x=11$

Substitute it into the second equation:

$11-7=3y-4\\ \\3y-4=4\\ \\3y=4+4\\ \\3y=8\\ \\y=\dfrac{8}{3}$

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3 years ago

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Leya [2.2K]

Answer:

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Step-by-step explanation:

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andreev551 [17]

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Svet_ta [14]

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Free_Kalibri [48]

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