mexa
mexa
19-10-2016
Mathematics
contestada
i dont understand how to do these three questions
Respuesta :
MichaelJustice
MichaelJustice
19-10-2016
9.
Well the first has the angles being 3x+12,x,and 90 so they have to add up to 180 degrees because it is a triangle.
3x+12+x+90 = 4x+102 = 180 solve
4x+102=180
4x=78
x=19.5
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