Can you solve this > : d

question 1:

if a = -3n + 2, and b = 5n - 7, what is the value of a + b, in simplest form?

2n + 9

-8n - 5

-3n

2n - 5

question: 2

if a = -3n + 2 and b = 5n - 7, what is the value of a - b, in simplest form?

question: 3

express the sum of the angles of this triangle in two different ways.