Answer:
Step-by-step explanation: So, you need to add like terms. All the A's must be combined, all the B's and so on. Let's start with the A's. You have -7 (because there is a minus sign in front), and a 10. -7 + 10 gives you 3. That is where your 3a comes from.
Next, let's do the B's. You have 10, -1, and -9. It equals zero. So, you have no B's in the final answer.
You leave the singular 5 because you can't combine it with anything. So your final answer is 3a+5.
If you need any clarification or other help, please let me know!
Answer: you need to add a picture, otherwise we don’t know how to help you answer that questions
Step-by-step explanation:
1) find the mean,
20+10+30+20+50+30+40+20/8= 27.5
2) Find the distance of each value from that mean
20- 7.5
10- 17.5
30- 2.5
20-7.5
50- 22.5
30- 2.5
40- 12.5
20- 7.5
3) Find the mean of those distances
7.5+17.5+2.5+7.5+22.5+2.5+12.5+7.5/8=10
The Mean absolute deviation for this data set is 10.
I hope this helps you
343=7^3