A) 152
b) 28
c) 208
d) 123

explain the answer, .

X = 152.

Figure out the angles of the insides of the triangle and then you'll have your

First angle = (supplementary) 180 - 85 = 95

Second angle = (supplementary) 180 - 123 = 57

95 + 57 = 152

152 = the measure of angles one and two

Find the third angle

180 - 152 = 28

Angle x and angle three (28) are supplementary angles so subtract to find x:

180 - 28 = 152

1.17+3.99a. you combine the terms with a to create 3.99 and the 1.17 stays because it has no like terms or a variable