Answer:
The value of x is 
Step-by-step explanation:
we know that
The centroid is the point where all 3 medians intersect. The centroid divides each median in a ratio of 2:1
so
In this problem

see the attached figure to better understand the problem
we have


substitute the values





Answer:35y-30
Step-by-step explanation:
Answer:
80.
Step-by-step explanation:



We know that the sunglasses cost $6, and the sandals are 3 times as much. We can multiply 6*3 to get 18. The sandals cost $18.