SOLUTION: On Monday, Harold picked up three donuts and two large coffees for the office staff.He paid $3.94. On Tuesday, Melinda picked up two donuts and six large coffees for the office sta
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Question 1019975: On Monday, Harold picked up three donuts and two large coffees for the office staff.He paid $3.94. On Tuesday, Melinda picked up two donuts and six large coffees for the office staff. She paid $7.20. What is the cost of one donut? What is the cost of one large coffee?
The cost of one donut is $
The cost of one large coffee is $
Found 3 solutions by josmiceli, solver91311, lwsshak3:
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the cost of one donut
Let = the cost of one large coffee
------------------
(1)
(2) ( in cents )
------------------------------
Multiply both sides of (1) by and
subtract (2) from (1)
--------------------
(1)
(2)
----------------------
and
(1)
(1)
(1)
(1)
(1)
the cost of one donut is $.66
the cost of one large coffee is $.98
check:
(2)
(2)
(2)
(2)
(2)
OK
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Solve the 2X2 system for 
, the price of one donut in cents, and 
, the price of one coffee in cents.
John
My calculator said it, I believe it, that settles it
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
On Monday, Harold picked up three donuts and two large coffees for the office staff.He paid $3.94. On Tuesday, Melinda picked up two donuts and six large coffees for the office staff. She paid $7.20. What is the cost of one donut? What is the cost of one large coffee?
The cost of one donut is $
The cost of one large coffee is $
let d=cost of one donut
let c=cost of one one lage coffee
3d+2c=3.94
2d+6c=7.20
9d+6c=11.82 (mult.1st eq by3)
2d+6c=7.20
subtract
7d=4.62
d=0.66
2c=3.94-3d=3.94-3*.66=1.96
c=0.98
The cost of one donut is $ 0.66
The cost of one large coffee is $0.98
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