Question

Lainey bought a set of 20 markers for $6 what is the cost of 1 marker?

Answer 1

$0.30

Explanation:

The ratio of number of markers to cost of markers is 20:6

Let's find an equivalent ratio that shows the cost for 1 marker.

A ratio where one of the terms is 1 is called a unit rate. We can divide the number of markers by 20 to get to 1 markers

The cost of 1 marker is $0.30

Answer 2

Hey there!
We'll set up a proportion:

`($20)/(6) = (1)/(x)`
We can cross multiply:
20x = 6
DIvide both sides by 20
x = 6/20 = 30/100 = 0.30 cents.
Hope this helps