SOLUTION: On Monday, Harold picked up two donuts and four large coffees for the office. He paid $4.70. On Tuesday, Melinda picked up four donuts and three large coffees. She paid $5.10 What
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Question 142633This question is from textbook
: On Monday, Harold picked up two donuts and four large coffees for the office. He paid $4.70. On Tuesday, Melinda picked up four donuts and three large coffees. She paid $5.10 What is the cost of one donut? What is the cost of one large coffee?
Thanks:) This question is from textbook
You can put this solution on YOUR website! 2D+4C=4.70 MULRIPLY THIS EQAUTION BY -2 & ADD.
4D+3C=5.10
-4D-8C=-9.40
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-5C=-4.30
C=-4.30/5
C=.86 FOR THE COFFEE.
2D+4*.86=4.70
2D+3.44=4.70
2D=4.70-3.44
2D=1,26
D=1.26/2
D=.63 FOR THE DONUT.
PROOF:
4*.63+3*.86=5.10
2.52+2.58=5.10
5.10=5.10
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