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15'x15' is 225 square feet; so I would figure on 225 tiles. I would get a few extras in case some crack.

Q: How many 12 x 12 tiles are needed for a 15'x 15 'area?

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24

-15x=-5*3x+2 -15x=-15x+2 +15x +15x ----------------- 0=2

Suppose the height is 15x cm. Then the width is 8x cm. Then the surface area is 2*(15x*8x + 8x*22 + 22*15x) cm2 Therefore 2*(15x*8x + 8x*22 + 22*15x) = 2506 or 15x*8x + 8x*22 + 22*15x = 1253 120x2 + 506x - 1253 = 0 so that x = -529/30 or 13/4 But x cannot be negative so x = 1.75. Therefore, volume = (15*1.75)*(8*1.75)*22 = 8085 cm3

35x + 15x = 50x

15x-16x = -1

-9y-15x ---- -3

225x

The GCF is 15x.

4

GCD(15x, 24x) = 3x

5x-15x+10 = 10-10x when simplified Assuming a request to solve the equation: 5x -15x + 10 = 0 5x - 15x + 10 = 0 5x - 15x = -10 or (multiplying everything by -1 gives you -5x + 15x = 10) so 15x - 5x = 10 10x = 10 x =1

hmm it would be -15x+12-8 so on this problem you just simplfy it would be -15x+4