If (3a+5)° and (2a-25)° are supplementary angles, then smaller angle

1.	If (3a+5)° and (2a-25)° are supplementary angles, then smaller angle is :a) 30°b) 55°c) 80°d) 85°[ PLZ EXPLAIN IT ALSO ]
Answer» ANSWER: (B) 55° Step-by-step explanation: (3a+5)°+(2a-25)°=180°(Supplementary Angles) 3a+5+2a-25=180° 5a-20=180° 5a=180+20 5a= 200° a=200/5 a= 40° (3a+5)°= 40×3+5 =120°+5 = 125° (2a-25)°= 40×2-25 = 80°-25 = 55° Therefore, the correct option is (b) 55°.

If (3a+5)° and (2a-25)° are supplementary angles, then smaller angle is :a) 30°b) 55°c) 80°d) 85°[ PLZ EXPLAIN IT ALSO ]

Answer»

(B) 55°

Step-by-step explanation:

(3a+5)°+(2a-25)°=180°(Supplementary Angles)

3a+5+2a-25=180°

5a-20=180°

5a=180+20

5a= 200°

a=200/5

a= 40°

(3a+5)°= 40×3+5

=120°+5

= 125°

(2a-25)°= 40×2-25

= 80°-25

= 55°

Therefore, the correct option is (b) 55°.