Answer:

Step-by-step explanation:
Explained all in my picture
Let x be the degree of angle a.
Angle b: 20+3x
Angle c: 55+x
We know that all angles add up to 180 degrees.
180=x+(20+3x)+(55+x)
180= 5x+75
180-75=5x
105/5=x
21=x
Angle a: 21 degrees
Angle b: 20+3(21) => 83 degrees
Angle c: 21+55 => 76 degrees
Hope I helped :)
Answer:
3^12
Step-by-step explanation:
(3^2)^6
6 * 2 = 12
3^12
Calculator check: (3^2)^6 = 531441
3^12 = 531441
Answer:
4
Step-by-step explanation:
9 times 4 = 36 and 36-10= 26
26 times two is 52
3 times 4 is 12
12 times two is 24
52+24= 76