Barbara is tiling her craft room floor with square tiles. she wants 6/10 of the square tiles to be red. if she uses 18 red, how many square tiles will be used to cover the floor?

18 is 6/10

18/1 = 6/10

Cross multiply

18x10 is 180

180/6 is 30 tiles total

Step-by-step explanation:

30 square tiles will be used to cover the floor.

Step-by-step explanation:

To find the number of tiles that will be used to cover the floor, we will have to interpret the statement mathematically and then solve.

Let x be the total number of tiles that will be used to cover the floor.

From the statement above, Barbara uses 6/10 of the square tiles which is  18 red.

so, 6/10 of the square tiles is equal to 18 red

which implies;

   of  x   =  18

× x  =  18

  =    18

cross multiply

6 × x  =  18  ×  10

6x  = 180

Divide both-side of the equation by 6

  =  

(At the left-hand side of the equation, the 6 on the numerator will cancel-out the 6 at the denominator leaving us with just x while at the right-hand side of the equation 180 will be divided by 6)

x   =

x = 30

Therefore, the number of square tiles that will be used to cover the floor is 30.

828. all there is to it!

here, if you ever need with rounding (or other forms of arithmetic/math) again, use this:

thats the rounding one, but if you just click the top left, it shows you all the calculators you may need!

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: