I understand now, it is 180 degrees.
Answer:

Step-by-step explanation:
By FOIL method, 
Roxanna will have to wash 8 driveways giving her a total of $62 to go towards her new video game. She’ll have $3 left over.
Given data:
The expression for the sum of 7 and z is,

Thus, the sum of the expression is 7+z.