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

what is the length of line AB

Organisms combine to form what?

Click through and choose the image that best represents the physical process that most likely resulted in the formation of the Rocky Mountains.

which function does the graph represent

The nurse manager working at a rehabilitation center for older adults notices an increase in the incidence of client falls. The nurse manager reprimands the nur

An airport offers two shuttles that run on different schedules. If both shuttles leave the airport at 4:00pm at what time will they leave the airport together.

How do you take notes to record the content of your classes?

Riley Company borrowed $36,000 on April 1, Year 1 from the Titan Bank. The note issued by Riley carried a one year term and a 5% annual interest rate. Riley ear

What is the cost of 3 but oak trees

Suppose the widespread acceptance of egoism would make everyone better off. This A. would be a strong moral consideration in favor of ethical egoism. B. would n