Which is an example of the commutative property?

a.
–(11 + 4) = –11 + (–4)

b.
–13 + 13 = 0

c.
9 + (–4 + 7) = (9 + –4) + 7

d.
18 + (–14) = –14 + 18

How many different triangles can be constructed with the angle measurements of 134° 10° and 36° ?

Which elements in the set below are integers? 12, –3⁄4,√ 25 , –7, √ 5 , 14⁄7, 9 a. 12, √ 25 , –7, 9 b. 12, √ 25 , –7, 14⁄7, 9 c. –3⁄4, 25 , √ 5 ,14⁄7 d. 12, –7, 9

Find the exact value of each of the following. in each case, show your work and explain the steps you take to find the value. (a) sin 17π/6 (b) tan 13π/4 (c) sec 11π/3