FrankieMaee FrankieMaee

23-03-2016
Mathematics

contestada

In a group of 30 children, there are 4 times as many boys as girls. How many girls are there?

Respuesta :

Аноним Аноним

23-03-2016

x=mumber of boys
y=number of girls.
I suggest this system of equations:
x+y=30
x=4y
We can solve this system of equations by susbtitution method.
4y+y=30
5y=30
y=30/5=6

x=4y
x=4*6=24

Answer: there are 6 girls

Answer Link

Otras preguntas

How did farmers alliances change the way small farmers operated?

Due to the roadworks, all traffic was _____ past the town hall instead.

Why did the democratic loser of the contested 1876 election, samuel tilden, urge democratic house members to go along with the decision of the electoral commiss

Silven industries, which manufactures and sells a highly successful line of summer lotions and insect repellents, has decided to diversify in order to stabilize

The area where the optic nerve leaves the retina and where photoreceptors are absent is called the ________. a.optic area b.blind spot c.fovea d.cornea

A 330 μf capacitor is connected in series with a 120 ohm resistor. what is the time constant for the circuit?

Why are muscles so important within the human body

While conducting an eye examination, the ophthalmologist shines a light into the client's pupil and observes that there is a slow recovery of the pupil size. wh

1. What was one major cause and one major effect of the Mexican-American War? (Write in full sentences) 2. Use the 5 W’s to describe what these leaders did in t

What two ratios are equivalent to 11/12