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Mathematics 8 Online
OpenStudy (anonymous):

What is the value of y in LMNO? https://www.connexus.com/content/media/456845-1282011-25520-PM-371715253.png 4 6 12 24

OpenStudy (cwrw238):

the diagonals bisect each other so y = 3x and y + 12 = 6x solve this system of equations and you get your answer

OpenStudy (anonymous):

so 4

OpenStudy (cwrw238):

no - but x = 4

OpenStudy (anonymous):

so 12 ?

OpenStudy (cwrw238):

plug y = 3x into other equation gives 3x + 12 = 6x 12 = 3x x = 4 so now you can get y

OpenStudy (anonymous):

because 24-12

OpenStudy (cwrw238):

right y = 3x = 3*4 = 12

OpenStudy (anonymous):

thnx help me with another?

OpenStudy (cwrw238):

ok

OpenStudy (anonymous):

What is angle 1 in this parallelogram? https://www.connexus.com/content/media/456845-1282011-30207-PM-329315299.png 20o 60o 80o 100o

OpenStudy (cwrw238):

angle 1 = 3m + 20 (opposite angles of parallelogram are equal) also 5m + 3m + 20 = 180o 8m + 20 = 180 8m = 160 m = 20 now plug m = 20 into formula for angle 1

OpenStudy (anonymous):

all the angles added up equal 360 right?

OpenStudy (cwrw238):

yes - also the two angles on each 'side' add up to 180

OpenStudy (anonymous):

it will be 80

OpenStudy (anonymous):

because the acute angle on the other side is 80

OpenStudy (anonymous):

thnx got them all correct

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