Multiply. −2
1
2•3
3
4
−2
1
2•3
3
4=nothing (Type an integer, proper fraction, or mixed number.)
put it in a mixed number pls or proper fraction pls

Step-by-step explanation:

Type an​ integer, proper​ fraction, or mixed​ number.)

put it in a mixed number pls or proper fraction pls

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180

the 3rd option is right

step-by-step explanation: