taraiahwilliams1484 taraiahwilliams1484

01-10-2017
Mathematics

contestada

The value of 110 coins, consisting of dimes and quarters, is $20.30. how many of each kind of coin are there?

Respuesta :

texaschic101 texaschic101

01-10-2017

d + q = 110......d = 110 - q
0.10d + 0.25q = 20.30

0.10(110 - q) + 0.25q = 20.30
11 - 0.10q + 0.25q = 20.30
-0.10q + 0.25q = 20.30 - 11
0.15q = 9.30
q = 9.30/0.15
q = 62 <==== there are 62 quarters

d = 110 - q
d = 110 - 62
d = 48 <==== there are 48 dimes

Answer Link

Otras preguntas

advantages and disadvantages of coal

How does the writer of deep contribute the mood of the story

which statement best explains the distinction between the roles that dna ligase and restriction enzymes perform in a dna cloning experiment?

National Prohibition, as authorized by the 18th amendment, stated that

Popular topics, such as handwriting analysis and astrology, are not considered psychology since they cannot be proven or disproven. They fall into the catagory

The first aspect of the argument you must evaluate is the truth of the reasons that are being used to support a conclusion. (Points : 5) True Fa

Is Mexico a City or a Country?

how much water should i drink

what night is Tyrant say to citizens who were asking for democracy

drag each phrase to the appropriate bin depending on whether it describes the synthesis of the leading strand, the synthesis of the lagging strand, or the synth