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Answer: 
Step-by-step explanation:
Let n= Number of packs John needs.
Tiles in 1 pack = 6
Tiles in <em>n</em> pack = <em>6n</em>
If he needs at least 100 tiles.
then
6n ≥ 100

The required inequality: 
To solve the question we need to note that:
area scale factor=(linear scale factor)^2
linear scale factor=1:2:3
Area scale factor=1^2:2^2:3^2=1:4:9
Hence, given that the area of the smallest triangle is 72 sq. inches, the area of:
medium triangle will be:
4/1*72=288 sq. inches
largest triangle will be:
9/1*72=649 sq. inches
Answer: 20
Step-by-step explanation:
3y + 2 = 62
3y = 60
y = 20