SOLUTION: Rachel and Sarah started out to visit Grandma. They drove for 50mjles and stopped to rest before driving for 30more miles. They decided to go back 10miles to a restaurant they had

Algebra ->  Finance -> SOLUTION: Rachel and Sarah started out to visit Grandma. They drove for 50mjles and stopped to rest before driving for 30more miles. They decided to go back 10miles to a restaurant they had       Log On


   

Question 1006292: Rachel and Sarah started out to visit Grandma. They drove for 50mjles and stopped to rest before driving for 30more miles. They decided to go back 10miles to a restaurant they had seen. After leaving the restaurant, they drive 80more miles to Grandma's house. If gasoline is $2 a mile,
How much money did Rachel and Sarah spent on gas to get to Grandma's house and back?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
They drove:+50+%2B+3+%2B+10+%2B+80+=+143+ mi
+143%2A2+=+286+
$286 is the cost of gas going to grandma's house
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The trip back from grandma's is a little different.
The trip they made going back to the restaurant
wasted +10+ mi going back and they needed to
drive +10+ miles to get back to the place
where they turned around, so +20+ mi were
extra miles +143+-+20+=+123+ is the return miles
+143+%2B+123+=+266+ total miles
+2%2A266+=+532+
$532 was spent on gas going and coming back