Answer:
Step-by-step explanation:
The mean (average) of a data set is found by adding all numbers in the data set and then dividing by the number of values in the set. The median is the middle value when a data set is ordered from least to greatest.
Hope this help
Answer:
21x + 12
Step-by-step explanation:
correct me of i am wrong
Infinite
x=-5y+3 is the same as x+5y=3
Answer:A)0.75
Step-by-step explanation:
Given
There are four options to a question
out of which one is correct with 4 points
one is wrong but carries 1 point
Other two are wrong with a negative Point
Probability of selecting an option is 
Expected score
Expected score=1+0.25-0.5
Expected score=0.75
The answer would be theorem Side angle side (aka SAS)