Answer:
583
Step-by-step explanation:
The mean of a data set is the average of the data set. It can be found by adding up all of the values and then dividing by the total number of values added. In this case, one is given the mean, and one needs to find a missing value. Since there is a missing element, add one to the total number of values in the data set. The missing element is represented by the parameter (x). Set up an equation and solve:

Simplify,

Inverse operations,

Answer:
A,B,C
Step-by-step explanation:
A.p.e.x
Answer:
6y^2-12y-4
Step-by-step explanation:
(8y^2-5y+7) - (2y^2+7y+11)
(8y^2-5y+7)-2y^2-7y-11
Combine like terms:
6y^2-12y-4
In an equation the Left hand side must equal the right hand side
4(5y-8-2)=185-15
20y-32-8=170
20y=170+32+8
20y=210
Therefore y=10,5
When you substitute the 10,5 and solve it on the left and side it's equal to 170 which is the answer on the right hand side
Answer:
it will be 175 / 100 = 7 / 4 okay