1: KIH because of alternate exterier (or ACF because of verticle angle)
2. x
3. CFG
answer:
81
169
81 =9²
169=13²
Step-by-step explanation:
-x+2y=-6
x-2y=6
x=2y+6
substitute in 2x-3y=11 gives us 2(2y+6)-3y=11
4y+12-3y=11
y=-1
-x+2(-1)=-6
-x=-4
x=4
Answer:
Exponents or powers.
