liamBedford liamBedford

26-04-2016
Mathematics

contestada

There are 120 children there are twice as many boys than girls how many girls are there?

Respuesta :

26-04-2016

Boys are b
Girls are g

b + g = 120
2g = b

Substitute the second equation into the first

2g + g = 120
3g = 120
g = 40

Plug in g = 40 and solve for b

b + g = 40
b + 40 = 120
b = 80

There are 40 girls and 80 boys.

Answer Link

Otras preguntas

What problem would a person have if the nucleic acid in one of his or her cells was damaged? A. That cell could not perform photosynthesis. B. That cell could n

What did Rome gain from defeating Carthage during the First Punic War?

1. EPIDEMIC : DOCTORS :: A. hospital : nurses B war soldier Analogy

A patient is seen in the clinic with complaints of increased urination and increased thirst. A urine reagent test shows he is positive for ketones, glucose and

I’ll give brainlest PLEASE HELP

2. Name the THREE European powers exhausted and ruined by war.

Active listening includes all of the following EXCEPT: A. paraphrasing B. clarifying C. ignoring D. empathizing Please select the best answer from

You have a pack of cards, and a friend draws one card from the deck. It is a red face card (i.e., jack, queen, or king of hearts or diamonds), Draw a Venn diagr

help me with this plzzzz

Find the value of x in the solution to the system of equations shown. y = 4x - 3 y= -x - 13A (-11 , -2)B (-2 , -11)C (-2 , -15)D (-2 , 5)Help asap!!