sharifshazia
sharifshazia sharifshazia
  • 13-05-2021
  • Mathematics
contestada

PLEASE HELP ME!!!
How many blue pens were there to start with?

PLEASE HELP ME How many blue pens were there to start with class=

Respuesta :

vidalmari6p99qfk
vidalmari6p99qfk vidalmari6p99qfk
  • 14-05-2021

Answer:

180 blue   70 red

Step-by-step explanation:

b= blue      r = red

b+r = 250

r = (250-b)

If 40% is removed the rest is 60%

If the 70% is removed the rest is 30%

0.6b + 0.3(250-b)  = 129

0.6b + 75 - 0.3b = 129

  0.3b = 54

divide by 0.3

  b = 180

    250-180 =  70

   60% 0f 180 = 108

   30% of 70 = 21

   108 +21 = 129

   

Answer Link

Otras preguntas

Into which of the following is another substance dissolved? A. Solvent • B. Solute c. Dissolute D. Precipitate
HELP for 100 points!
find the simple on R5000 loan for 3years at 9% interest​
What is the image of (−3,−8) after a dilation by a scale factor of 4 centered at the origin?
Superman needs to save Lois from the clutches of Lex Luthor. After flying for 11 seconds, he is 1638 meters from her. Then at 19 seconds he is 1302 meters from
solve the following equation
convert the given fractional numbers to percents b) 5/4
A boy says to us"I want to invite you" into indirect speech​
what is the distance between -0.4 and -8.8
Two marathon runners leave the starting gate, one at 16 mph and the other at 12 mph. If they maintain the pace, how long will it take for them to be 1/3 of a mi