Question

If 20 articles cost ? 90, then the cost of 9 articles is ?
a 45
b 4.50
c 40.50
d 42

Answer 1

So, if
20 articles = 90 dollars
9 articles = x dollars

So, we can set up a proportion
\[\frac{ 20 }{ 90 } = \frac{ 9 }{ x }\]

can you solve for x?

Answer 2

yeah i can thx

Answer 3

yw~!

Answer 4

Also welcome to questioncove C:

Answer 5

thanks

Answer 6

yoo