Answer:
-30-45k
Step-by-step explanation:
-5*6=-30
-5*9k=-45k
Answer: 16a^2 -9
Step-by-step explanation:
(4a -3) (4a +3)
16a^2 + 12a - 12a -9
16a^2 -9
Use cosine rule,
cos(A)=(b^2+c^2-a^2)/(2bc)
=(10^2+12^2-6^2)/(2*10*12)
=13/15
A=29.926 degrees.................................(A)
cos(B)=(c^2+a^2-b^2)/(2ca)
=(12^2+6^2-10^2)/(2*12*6)
=5/9
B=56.251 degrees.................................(B)
cos(C)=(a^2+b^2-c^2)/(2ab)
=(6^2+10^2-12^2)/(2*6*10)
=-1/15
C=93.823 degrees.................................(C)
Check:29.926+56.251+93.823=180.0 degrees....ok
Answer:83÷3=27.6 or 27.667
Step-by-step explanation:
Answer:
Step-by-step explanation:
The scientific notation:
We have:
