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im.new · Answer

so now ppl help ok heres the question

im.new · Answer

In a bag of blue and yellow marbles, the ratio of blue marbles to yellow marbles is 3:5. If the bag contains 60 yellow marbles, how many blue marbles are there?
A)	12	
B)	24	
C)	36	
D)	48

im.new · Answer

back

phi · Answer

you should write a proportion
$$ \frac{3 \ blue}{5 \ yellow}= \frac{x}{60 \ yellow} $$
and solve for x

im.new · Answer

12

im.new · Answer

right or wrong

im.new · Answer

i have one more question

phi · Answer

to solve
$$ \frac{x}{60}= \frac{3}{5} $$
multiple both sides by 60, like this
$$ 60\cdot \frac{x}{60}= 60\cdot \frac{3}{5} $$
now simplify both sides
(on the left, 60/60 is 1)

im.new · Answer

60 x 60 is 3600   12 x 60 is 720

phi · Answer

the left side is 60/60 * x  which is 1*x  or just x
now do the right side