Answer:
tt
Step-by-step explanation:
boi
Answer:
12a−9
Step-by-step explanation:
Distribute:
=(3a)(3)+(3a)(−a)+(3)(a2)+(3)(−3)+3a
=9a+−3a2+3a2+−9+3a
Combine Like Terms:
=9a+−3a2+3a2+−9+3a
=(−3a2+3a2)+(9a+3a)+(−9)
=12a+−9
Step-by-step explanation:
m L DBC = 90-20 = 70°
m L DCB = 20°
m L CDB = 90°
m L ACD = 90-20 = 70°
m L ADC = 90°
Answer:
between 7 and 8
Step-by-step explanation:
Consider perfect squares either side of 63 , that is
49 < 63 < 64 , then
<
<
, that is
7 <
< 8