Use the triangle angle theorem:
All interior angles of a triangle equal 180 degrees.
If you use the theorem you should get the first one 19,70,91
Answer:

Step-by-step explanation:

the product rule states that you add exponents when you multiply

the quotient rule states that you subtract exponents when you divide

-4 is what you put on both sides Bc it’s half of b
Let Cedric's age be c
tyshon= 3c-3
3c-3 +c =3c+c-3 = 4c-3
4c-3=57
4c=60
c=15
tyshon=15×3-3 = 42