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 remainder when (x4 + 36) is divided by (x2 – 8)? 36

Approximately how much of the Ottoman Empire was lost by 1914?

Can someone please help

What is the difference between Provolone cheese and American Cheese? I need to know for my science project ASAP!!!!!!!

Nigel paints 5/4 square yards in 1/3 hour. find the unit rate.

the inequity of Six times a number x is at least −24

if you roll a die what is the probability of rolling a 2 or 6?

classical musicians and the terror of the audition and the audition support the conclusion that auditions require a musician's best effort. use key details from

Anyone explain on what to do?Sabah has $450 to pay for college textbooks. She expects to pay about $75 per book. Her friend told her that 4 of them can be check

Question at the top : which choice describes the media being a government “watchdog”