Prove this qsn plzz and fast​

Step-by-step explanation:

Let use the first of the medians. Medians AX.

Median AX is the midpoint of BC so our median is

Let use the second median.

Median BY is the midpoint of AC so our median is

Let use the final median.

Median CZ is the midpoint of AB so our median is

Now add all them up

Add like terms.

So

AX+BY+CZ=0

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart