sami7 sami7
  • 01-12-2015
  • Mathematics
contestada

a teacher had 21 red pens. if the ratio of red pens to blue pens owned was 3:1 how many pens did she have in total

Respuesta :

JaySL JaySL
  • 01-12-2015
If the ratio of red to blue pens is 3:1, we can find the amount of blue pens by multiplying by 1/3, to get 21*1/3=7.  There are 21 red pens and 7 blue pens, so there are 21+7=28 pens total.
Answer Link

Otras preguntas

Carlo said a population can have more than one sample associated with it. do you agree or disagree with his statement.
The population of a local species of mosquitoes can be found using an infinite geometric series where a1 = 740 and the common ratio is one sixth
Which one of the following choices represents an incomplete protein? A. Meat B. Fish C. Eggs D. Nuts
The exchange rate is £1=$1.54 how many £ would I get for $77
dossier el mecanoscrit del segon origen solucionari???
What is the answer to the math problem to what is 500 divided by 12??
How do I convert 6400/4800 to at ratio
How to round 21.38 to the nearest tenth?
if the sun moved what would happen to the earth?
2. Solve the following system of equations using substitution. 2x+2y=38 Y=x+3 A.(8,11) B.(4,7) C.(35/4, 47/4) D.(-4,-7)