254,064 views
21 votes
21 votes
Super confused! Please help! Explanation would be amazing, thanks! :)

Super confused! Please help! Explanation would be amazing, thanks! :)-example-1
User Neha Chaudhary
by
2.2k points

2 Answers

29 votes
29 votes

Answer:

A = 29°

Explanation:

set

(3x-4) + (9x+17) + (6x-31) = 180

Solve for x

18x - 18= 180

18x = 198

x = 11

So A will be

A = 3x - 4

A = 3(11) - 4

A = 29°

User Sam Deane
by
3.3k points
11 votes
11 votes

Answer:

116°

Explanation:

total angle of a triangle: 180°

thus, (3x-4)+(9x+17)+(6x-31)= 180°.

3x-4+9x+17+6x-31= 180°

18x-18= 180°

18x= 198°

x= 198°/18

x= 11°

angle of A: (9x+17)°

9(11)+17= 99+17

= 116°

User Krupal
by
2.5k points