Answer:
B - Lower case letters
Step-by-step explanation:
In algebra, unknown quantities are usually represented as lower-case letters like etc.
Answer:
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A) 20.9
b) (230 + x) / 12 = 22
230 + x = 264
x = 34 years old
Answer:
a = 25
Step-by-step explanation:
The exterior angles of a polygon sum to 360°
Sum the exterior angles and equate to 360
a + a + 40 + 51 + 55 + 54 + 2a + 60 = 360, that is
4a + 260 = 360 ( subtract 260 from both sides )
4a = 100 ( divide both sides by 4 )
a = 25