The answer is A, -4. Hope this helps!
805,000,706 is how you write it
How do you calculate the mean (average) ?
Isn't it just
Mean = (total points of all the tests) divided by (number of tests) ?
Let's work with that.
Multiply each side of that formula by (number of tests), and you have
Total points of all the tests = (Mean) times (number of tests).
In this problem, you know the mean, and you know the number of tests,
so you can easily calculate the total points.
K=2
- A'=2(2.5)=(4,10)
- B'=2(1,2)=(2,4)
- C'=2(3,1)=(6,2)
Translation of 2 units left means change in x
- A''=(4-2,10)=(2,10)
- B"=(2-2,4)=(0,4)
- C"=(6-2,2)=(4,2)
Translation of 1 units up means change in y
- A'''=(2,10+1)=(2,11)
- B'''=(0,4+1)=(0,5)
- C'''=(4,2+1)=(4,3)
