Angle 1 = 20x+60 and angle 3 = 30x+20 find the measure of angle 1

Which expressions are equivalent to -6 + 3m

1. are the corresponding angles congruent 2. find the ratios of the corresponding sides 3. is triangle jkl congruent to triangle rst? if so what is the scale factor

Asurvey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand x aspirin. how many doctors use brand x aspirin