Question

The interior angles of a triangle have measures 100°, (4y+25)° , and (3y+20)° . What is the value of y? Enter your answer: y =___
Please help me asap!!
10 Points!!!
Whoever anwsers first (and correctly) will be marked brainliest!!

Answer 1

Answer:

y = 5

Step-by-step explanation:

Given angles are 100°, (4y + 25)°, (3y + 20)°

Note: The interior angles of a triangle always add upto 180°.

⇒ 100 + 4y + 25 + 3y + 20 = 180

⇒ 145 + 7y = 180

⇒ 7y = 35

⇒ y = 5

Therefore, the value of y is 5.

Hope it helps!

Answer 2

Since the sum of all angles of a triangle is 180°

So 100°+4y+25°+3y+20=180°

145°+7y=180°

7y=180°-145°

7y=35°

y=5°