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 me please, ASAP;(

Do you think that how you act/present yourself on social media/online is different than in person? Why do you think that is? ( In Paragraph Form )

How many significant figures are there in a length measurement of: 0.042 cm?

(-4)-6-(-11) simplify

Bruce went hiking on Saturday and followed a trail for 3 7/10 miles. The following week he hiked on a trail that was 3/4 of that distance. Write and solve an eq

AAAAAAAAA HELP QUICK PLS!!! How do we measure the average kinetic motion of molecules in a solution? Thank you <3

A class is made up of 16 boys and 4 girls. Half of the girls wear glasses. A student is selected at random from the class. What is the probability that the stud

Help please someone I need help

Describe how social and environmental responsibility could help to fight social challenges

A blueprint of a room is drawn to a scale of 2 inches = 7 feet. The actual length of one wall is 56 feet. What is the length of this wall on the blueprint?