7 answers
(click or scroll down)
(a)
Ratio and proportion:
4 gray : 5 blue = 60 gray : x blue
To solve for n, we can rewrite it in fraction:
4/5 = 60/x
Cross-multiply:
4x = 60*5
4x = 300
x = 300/4
x = 75 blue tiles
(b)
Let n = some factor
since their ratio (4:5) is always the same, we can say that
4n + 5n = 540
9n = 540
n = 60
Thus,
4n = 240 gray tiles
5n = 300 blue tiles
For checking, the ratio of gray:blue tiles must be 4:5.
hope this helps~ `u`