Answer:
- x = 37
- DG = 22
- AG = 44
- AD = 66
Step-by-step explanation:
We presume your "centroid ratio theorem" tells you that AG = 2·DG, so ...
(x+7) = 2(x -15)
x + 7 = 2x - 30 . . . . eliminate parentheses
37 = x . . . . . . . . . . .add 30-x
Then AG = 37+7 = 44
and DG = 37-15 = 22.
Of course, AD = AG +GD = 44 +22 = 66
The better buy is $4.40 because it costs only 22 cents per ounce while $3.68 costs 23 cents per ounce
Eva first should have started with the numbers in parentheses.
Step 1: (7.3-7.2) = 0.1
Step 2: 0.1+3.7=3.8
Step 3: 3.8-3.8=0
The error is in step 2. She wrote commutative instead of associative.
1 person can finish 1st, 1 person can finish 2nd, one can finish 3rd, out of one of the other three one has to be last. Mark as Brainliest please