Answer:
y=95
Explanation:
we know that the triangle angles sum is 180°
to find Y you should find x
we are going to find x, we know that a straight angle is 180, to find the x you should:
![120+x=180](https://img.qammunity.org/2023/formulas/mathematics/high-school/cf0ohpf57qd1rmrp124n23sqhsrzotfpon.png)
move 120 to the other side with a negative sign:
![x=180-120\\x=60](https://img.qammunity.org/2023/formulas/mathematics/high-school/f94n1mqiqezxjvfsrojz2p9oodaqi7ii8j.png)
angle
![x=60](https://img.qammunity.org/2023/formulas/mathematics/high-school/tazuf4w1clwti09530xh9efw0dxrezcxc9.png)
now we know enough angles to find y:
![25+60+y=180](https://img.qammunity.org/2023/formulas/mathematics/high-school/gy59qllga3wws3rwiwaz9ukpsejl9orfyt.png)
25 is given in the picure and 60 is the x angle while 180 is the sum of a triangle angles, we have to flip the equaton to find y:
![25+60+y=180\\85+y=180\\y=180-85\\y=95](https://img.qammunity.org/2023/formulas/mathematics/high-school/wt7ab01cxreg800cbjar3m12vbtxn4av4m.png)