alexandraemk240 alexandraemk240

01-07-2018
Mathematics

contestada

A bag has red and white counters in the ratio 4:7. If I add 4 white counters the ratio becomes 1:2. Work out the number of red counters in the bag.

Respuesta :

konrad509 konrad509

01-07-2018

[tex]\dfrac{4x}{7x+4}=\dfrac{1}{2}\\ 7x+4=8x\\ x=4\\\\ 4x=4\cdot4=16[/tex]
16 red marbles

Answer Link

Otras preguntas

HELP AND I WILL GIVE 20 POINTS

What is density?????????????

The image above is one of the most famous pieces of Japanese art. Who is the artist of this image? a. Sesshu b. Ikkyû c. Katsushika Hokusai d. Himeji

Name an example(s) of an organism that can be about 10 centimeters in size?

What was Spain searching for in the New World? (you can more than one answer) a route to the Orient trading partners in America riches allies to help Spanish ar

draw a short roller coaster on graph paper, plot ordered pairs on its path, and determine the slope, or rate of change, along the ride. draw a short roller coas

Why did the colonists protest passage of the Stamp Act? They claimed that Parliament was attempting to ruin the colonial economy. They opposed their tax m

Problem 3 Scale of the Solar System The real diameters of the Sun and Earth are approximately 1.4 million kilometers and 12,800 kilometers, respectively. The Ea

Think of ways in which the values of one group of people clash with the values of another group. List at least five examples.

What is a short-tailed carnivore? _ _ _ X