You first identify what supplementary angles are,angles that add up to 180.
5x+2+8x+9=180
17x+11=180-11
17x=169
x=169divided by 17
x=9.9411
x=10 when rounded into the next value
8x*10=80+989
14 + x < = 3x....ur inequality
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the sum means add....so the sum of a number and 14 is 14 + x
is less then or equal....< =
3 times the number....3x
You might be able to get the text-to-speech option on your phone to do this for you, since it involves saying the fractions aloud.
1/2 ⇒ one-half
2/3 ⇒ two thirds
1/4 ⇒ one quarter, or one fourth
2/4 ⇒ two fourths, or two quarters
2/5 ⇒ two fifths
5/6 ⇒ five sixths
4/7 ⇒ four sevenths
6/8 ⇒ six eighths
5/11 ⇒ five elevenths
1/12 ⇒ one-twelfth
1/20 ⇒ one-twentieth
_____
IMO, the use of a hyphen or not depends on the context. If the fraction itself is the focus, you might say one twelfth. If it is describing a portion of something else, you might say one-twelfth [of a cake].
<edf is 86 vertical angles
< e + <edf + <efd =180 sum of the angles of a triangle
42+ +86 +<efd =180
128 + <efd = 180
subtract 128 from each side
<efd = 52
<efd + <dfg = 180 straight line
52+ <dfg = 180
subtract 52 from each side
<dfg = 128
Answer : 128
