PLEASE HELP ME!

For 60 students in a large class, 12 marks are added to each score to boost the students' scores on a relatively difficult test.

a) Knowing that sigma (x+12)=4404, find the mean score of this group of 60 students.

b) Another section of the class has 40 students and their average score is 67.4. Find the average of the whole class of 100 students.

answer:

.

Step-by-step explanation:

idk bring the function back   im not smart

step-by-step explanation:

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation: