abcd is a quadrilateral inscribed in a circle. given that ab=ac and angle BAC=50 DEGREE, find angle ADC
1711926040130305130200840501302008104021713084043030520021307030401050312130200840501302008104041140302010640130410505191101205070...
-8+9=
3*x+7*y+1*z=307
4*x+10*y+1*z=411
define overlapping set
5011207233.4748
6529668.5037
6226342.1974
7011
3063
1275601010074
3948
14022
6126
.1054
9598
1216
7865982
1070473.916...
110÷3600×36
.6.25÷0.5
find a sum 67 plus 89