Answer:
5
Therefore, she must get 5 points from the last quiz to have a mean score of 4
Step-by-step explanation:
Mean is the average of a set of data, it is the sum of the data divided by the number of data.
To have a mean of 4 from 4 quizzes;
Let x represent the total;
mean = x/4
4 = x/4
x = 4 × 4 = 16
To have a mean of 4 he must have a total score of 16.
Let y represent her score in the last quiz;
16 = 4+3+4+y
16 = 11+y
y = 16-11 = 5
Therefore, she must get 5 points from the last quiz to have a mean score of 4
The 5th term would be 18. Since you are adding by four each time, the fourth term or t(4) would be 14. Adding four more would equal 18, which is the fifth term.
-2.1 , -1.2 , -0.6, 0.9, 1.3 , 1.5 , 3.4
Hope this helps!
