4x+4y+4z. I was taught to take out what was in each term, in this problem that would be 4: 4(X+y+z). Meaning A) Annie did the problem right :) I hope this helps!
Answer:
3026
30
Step-by-step explanation: Average sum of the female and male's test score is the sum of expected value of each gender:

Assuming x represents the random male selected and y represents the random female selected:

3026
The average sum of their scores is 3026.
Average difference is the difference between the expected value (mean) of each gender:

1528 - 1498
30
The average difference of their scores is 30.
2,800-3,200
Explanation: multiply 35 and 40 by 80 since those are the variables
Answer:
Hello there!
The answer you are looking for is B.!
Step-by-step explanation:
That is the only one that makes sense.
Have a great day!