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

________ is the occupational area in which one out of four sociology majors finds employment.

Shelley drinks two caffeinated grande lattes every morning. in terms of neurotransmission, what is happening in shelley's body?

What is the gulf stream and how does it affect north and northwestern europe?

PLEASE HELP! −15x−5y=45 −2x+6y=6 Graph the system of equations. What is the solution? x=__ y=__

H (x)=x^2-5 Find h (-7)

How is ozone formed in the upper atmosphere?

________ is the occupational area in which one out of four sociology majors finds employment.

This is the process by which land, mainly due to overgrazing, deforestation, or inappropriate agriculture, loses vegetation and soil moisture.

Taken together, substance abuse costs the United States over __________ a year. A. half a billion dollars B. a billion dollars C. half a trillion dollars D.

What is the action in book 11 of the odyessey?