HazemTarek
contestada

an all day parking meter only takes dimes and quarters. If it contains 100 Coins with a total value of $14.50, how many of each type of coin are in the meter?

Respuesta :

Brittxny
x= # of dimes, y= # of quarters
100 = x+y
14.50= .10x+.25y
This is substitution.
100 = x+y
x= 100-y

14.50= .10(100-y)+.25y
14.50= 10-.10y +.25y
4.50= .15y
30 = y, OR there are 30 quarters

100=x+y >>> 100=x+30 >>> 70=x, OR there are 70 dimes

Otras preguntas

Q&A Education