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

If the 'Cell wall' had a career; what would it be?

The Triple Alliance was a loose agreement of cooperation among? a)Serbia, Germany, and Britian b) Italy, Serbia, and France c) Germany, Italy, and Russia d) Ger

What contributions has Janet Jackson made to society?

please help! i need to write sentences with the words comically and tropically

Mallorie has $3 in her wallet.If this is 10% of her monthly allowance, What is her monthly allowance?

gavin has 460 baseball players in his collection of baseball cards and 15% of the players are pitchers.how many pitchers are in gavins collection

7/8 minus 1/2 equals

what is 1/4 of 100 dollars

Where does the name "Black Hole" get it's name?

A mutation changes the DNA sequence AAGCCTGGCAAT to the new sequence AAGCCTGCGCAAT. What kind of mutation has occurred? A. deletion B. insertion C. duplication