Answer:

Step-by-step explanation:
we know that
The formula of law of cosines is equal to

where
a, b and c are sides. C is the angle opposite side c
In this problem we have

substitute the given values






Answer:
m∠ADB = 59°
Step-by-step explanation:
I've provided my work which also includes how I check my answers by using the information given! Hope this helps!!! If you have any questions, I can try to help.
Answer:
The answer would be g 2(7+2)=16
Step-by-step explanation:
You have to contribute and combine like terms and that is how you get your answer
Step-by-step explanation:
a_n=6-n
➜a_1=6-1
<h3>➜5</h3>
➜,a_2=6-2
<h3>➜4</h3>
➜a_3=6-3
<h3>➜3</h3>
➜a_20=6-20
<h3>➜-14</h3>