Problema Solution
happy meals. the total price of a hamburger , an order of fries, and a coke is $3.00. The price of a hamburger minus the price of fries is $0.20 and the price of fries minus the price of a coke is also $0.20. Use a system of equations and matrices to find the price of each item.
Answer provided by our tutors
LET HAMBURGER PRICE- X PER UNIT
FRIES PRICE - Y PER UNIT
COKE PRICE - Z PER UNIT
NOW
X-Y = .20 - (1)
Y-Z= .20 - (2)
SO (1) - (2)
X-Z= .40 so x= .40 + z and y = .20 + z
Now X + Y + Z = 3.00
sO .60 + 3Z = 3.00
Z=.8 $
putting z =.8 we get
Y= 1 $
x= 1.2 $