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 molar mass of H2(SO4)3?

16) What is an extratropical cyclone?

5) Answer True or False. In the sentence "She will have been in France for two years at the end of this year," the words will have been constitute an auxiliary

Which statement is true about a sample created using stratified random sampling? A) The first member on the list of names in the population is chosen and every

4) A car is usually priced at £9800 but now has a discount of 8%. What is the new price of the car?

Which expression has a value of 10 A.3√13 B.√5 C.3√30 D.√100 All the numbers before the square root are powers

No work needed, just the answer!

A 6-column table titled The cost of and return on pie production has 7 rows. The first column is labeled pies produced per day with entries 0, 1, 2, 3, 4, 5, 6.

Jabo is standing next to a building. Jabo is 6.25 feet tall, and cast a shadow that 14 feet long. If the building cast a

5. Vertical stretch by 3 then Translate 4 units up.- Equation