Answer:
1. Combine the constant terms by adding 7 and –2.
4. Combine the like variable terms by adding the coefficients
5. 5 k and negative 3 k are like variable terms
6.The constants 7 and –2 are like terms.
7. The equivalent expression is 5 + 2 k + n.
Answer:
1 option is correct
Step-by-step explanation:
Angle AOB and DOC is vertically opposite angle
Answer:
Simplify the expression: 
Use the exponent power:

Apply the given rules;

Simplify:

then;

Therefore, the simplified expression of
is, 
5m + 4m = 72
Combine like terms.
9m = 72
Divide both sides by 9.
m = 8