Answer:

Step-by-step explanation:
![\displaystyle -9[5] + 3[7] + 4 = -45 + 21 + 4 = -20](https://tex.z-dn.net/?f=%5Cdisplaystyle%20-9%5B5%5D%20%2B%203%5B7%5D%20%2B%204%20%3D%20-45%20%2B%2021%20%2B%204%20%3D%20-20)
I am joyous to assist you anytime.
Answer:

Step-by-step explanation:
6 and - 2 are the only two solutions to the required quadratic equation.
So, if the variable is represented by X then (X - 6) and (X + 2) will be the only two factors of the polynomial function.
Therefore, the equation is
(X - 6)(X + 2) = 0
⇒
If the leading coefficient of the equation is 3 then we can write the equation as
(Answer)
-48 is the answer to the question
mean = Summation of Data/Number of Data Added
mean = [(-54)+(-32)+(-70)+(-25)+(-65)+(-42)] / 6
mean = -288 / 6
mean = -48
The answer is 31. 10+10+20+1=31