joannakawata6
26.09.2021 •
Mathematics
The square of 'a' is 121, then a=
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Ответ:
Ответ:
11
Step-by-step explanation:
d
Ответ:
)
Step-by-step explanation:
(-7x + 12)° + (-8x + 48)° =180. (supplementary angles)
-7x-8x +12+48=180
-15x + 60=180
-15x = 180-60
-15x =120
-15x/-15 = 120/15
x= -8°
BDC= -7x+12
= -7(-8)+12
=68°
CDA=-8x +48
= -8(-8)+48
= 112°