Assuming O=o
group then add like terms
1o+2a+1b-2o-1b+1o=
1o+1o-2o+2a+1b-1b=
0+2a+0=
2a
Answer:
its d b/sinB=c/sinC
Step-by-step explanation: trust me
Step-by-step explanation:

-2x - 4 > 10
Multiply both sides by -1 and reverse the inequality symbol.
2x + 4 < -10
Now subtract both sides by 4.
2x + 4 - 4 < -10 - 4
2x < -14
Divide both sides by 2.
2x/2 < -14/2
x < -7
<u>To find the median</u>
⇒ must define what is a median
⇒<u>Definition of median</u>: <em>middle number of an ordered set</em>
<em />
<u>Lets look at the information given</u>
Set when ordered: 13,15, 17,x,20,21 with median of 18
⇒ In this case, there is an even number of numbers
⇒ to find the median
⇒ must find average of two numbers closest to the middle
⇒ which are 'x' and '17' which is equal to the given median 18
<u>Let's set up the equation</u>:

<u>Answer: x = 19</u>
<u></u>
Hope that helps!