Barbara is tiling her craft room floor with square tiles. She wants sixthtenths of the square tiles to be red. If she uses 18 red tiles how many square tiles will cover the floor ?

108 square tiles

Step-by-step explanation:

This problem is solved by means of a law of proportionality. Knowing that a yes 1/6 of the floor would be with red square tiles and that represents 18 in quantity. The entire floor is 100%, that is to say the unit, therefore applying the law of proportion would look like this:

% of floor                       Amount of square tiles

1/6 > 18

1 > X

Then X is equal to:

X = 1 * 18 / (1/6)

X = 108, therefore 108 square tiles are necessary to cover the entire floor.

Step-by-step explanation:

Below is an attachment containing the solution.

true statements:

a) x + y = y + x   ⇒ commutative property of addition

b) (x * y) * z = x * (y * z) ⇒ associative property of multiplication

d) (x + y) + z = x + (y + z) ⇒ associative property of addition

false statements:

c) x - y = y - x   should be: x - y = - y + x

e) (x - y) - z = x - (y - z) should be: (x - y) - z = x - (y + z)

step-by-step explanation: