Answer:
y = 5
x = 25
Step-by-step explanation:
B and C are both base angles, so they are equal to each other;
[Equation] 75 = 3x
[Divide both sides by 3] x = 25
Then, all angles of a triangle added up together are equal to 180 degrees;
[Equation] 75 + 3x + 4y + 10 = 180
[Plug in x] 75 + 3(25) + 4y + 10 = 180 -> 75 + 75 + 4y + 10 = 180
[Subtract 160 from both sides] 4y = 20
[Divide both sides by 4] y = 5
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather
