What does a equal?

(don’t just give the answer pls explain)

hi <3

okay so there are a few rules you need to be aware of first:

- angles in a triangle sum to 180

- angles on a straight line sum to 180

so first, lets find the missing angle of the triangle:

180 - 80 - (a - 5) = 105 - a

now lets form an equation because we know that 180 subtract this angle equals 2a:

180 - (105 - a) = 2a

75 + a = 2a

subtract a from both sides:

a = 75

hope this helps :)

the sum of two interior opposite angel is equal to the exterior angel

answer: 5 17/33 % (to the tenth)

step-by-step explanation:

he guessed: 34.5 pounds

actual weight is 32.7

there for he is off:

34.5 -32.7 = 1.8

32.7 is the 100%

1.8 represents %? of 32.7

therefore:

32.7   - 100%

1.8     -     x%

x= 1.8*100%/32.7% = 18*100%/327%

x=1800%/327%   = (5 165/327)%

to the tenth:

5 17/33 %