myat88894
myat88894 myat88894
  • 11-09-2022
  • Mathematics
contestada

89 children were at a party. When 50% of the girls and 20% of the boys left, there were 55 children remaining at the party. How many boys were at the party at first?​

Respuesta :

tramphong2k2 tramphong2k2
  • 11-09-2022

Answer:

Step-by-step explanation:

x: boy

y: girl

x+y=89 & 89-(0.2x+0.5y)=55

⇒x+y=89 & 0.2x+0.5y=34

⇒ x=35 & y=54

Answer Link

Otras preguntas

Beowulf slays Grendel in order to — A) save Hrothgar and the Danes from the monster B) prevent Grendel from invading the land of the Geats C) keep Herot from be
What issue were the Virginia and New Jersey Plans attempting to resolve?
6m - 11 = 2 + 9m - 1
3 2/5 times 1 2/3 is
Together, the populations in an ecosystem form a(n) __________.
What is 160,656 rounded to hundred thousand
Which is an accurate description of the processes used to turn the DNA code of a gene into a protein?
The prairie settlers endured all of the following hardships except: a. The sod was difficult to plow. b. There were no railroads to transport goods and livest
21,326,438.86 expandedform
As a testament to how bad smoking is, _____ of current smokers would like to quit. A. 90% B. 85% C. 70% D. 60%