N-3. Evaluate the algebraic expression when n=5
A. 2
B. 8
C. 5
D. 5/3

A. 2

Step-by-step explanation:

if n=5 then the expression is 5-3 which is equal to 2.

1.true 2.false? ? i think. .

step-by-step explanation:

m∠5 + m∠3 = m∠1   is true.

m∠5 + m∠6 = 180 is true

m∠2 +m∠3 = m∠6   is true

m∠2 +m∠3 +m∠5 = 180   is true