Can someone tell me what im doing wrong please. Lookbat pic ty. This what I'm getting 3x-5 +145=180 3x=180degrees subtract 145 plus 5
3 divide 30
X=10 ?

x=50º

Step-by-step explanation:

They are vertical angles, so they have the same degree

145=3x-5

150=3x

x=50

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional