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

Why did President Wilson send the U.S. Navy to occupy the port of Veracruz? A. U.S. sailors had been briefly arrested. B. Mexico was plunged into a violent rev

A planet has a circular orbit around a star. It is a distance of 53,000,000 km from the centre of the star. It orbits at an average speed of 49,000 km/h. How ma

PLEASE HELP!! Wesley initially filled a measuring cup with 5/6 of a cup of syrup from a large jug. Then he poured 1/2 of a cup back into the jug. How much syrup

Multiply (x2 + 3x + 5)(2x2 - 2x + 1). A. 2A - 6x2 + 5 B. 3x2 + x + 6 C. 2A + 4x2 + 5x2 - 7x + 5 D. 2x4 + 8x3 + 17x2 + 13x+5

Solve the attachment...

Which statement is an example of the symmetric property of congruence

Can you please help me solve this step by step?

write down any two efforts for making quality of life

Find the value of x in each case:

plz help answer fast irrelevant answers will be reported