thy2002nguyen thy2002nguyen

01-12-2014
Mathematics

contestada

Phil has 50 nickels and dimes worth $4.15. How many of each coin does he have?

Respuesta :

01-12-2014

[tex]x-number\ of\ nickels\\50-x-number\ of\ dimes\\\\0.05x+0.1(50-x)=4.15\\0.05x+5-0.1x=4.15\\0.05x-0.1x=4.15-5\\-0.05x=-0.85\ \ \ \ |:-0.05\\x=17\\\\50-17=33\\\\He\ have\ 17\ nickels\ and\ 33\ dimes.[/tex]

Answer Link

Otras preguntas

what were some of the problems that led to the rise of dictators in germany ,italy ,and japan?

In scienceclass the teacher measured 800 milligramns of an chemical.How manyn grams is it.

write a paragraph for me using these words: art critic and art historian

a gasoline pump delivers 4 2/5 gallons of gas per minute. how many minutes will it take to fill a gas tank that holds 16 1/2 gallons?

use the function rule, y= 2x+5, to find the values of y when x =1,2,3,4. write the answers as ordered pairs that would be used to graph the function. show your

What happens at a conservative plate boundary? Someone please help me in this because I have test today. Aswell please don't copy it from the internet.

Why can't we change the subscripts in balancing chemical equations?

How did the Romans rule differently from the Etruscans?

A wet towel is hanging on a clothesline in the sun. What process does the towel dry by?

How do you think the people conquered by the Romans felt about their new rulers