How many tiles are needed to cover a square patio measuring 18 ft on a side if each tile covers 1 square ft

324 tiles.

Step-by-step explanation:

Close you eyes and try and imagine a row that contains 18 tiles. In order to cover the patio, you need 18 such rows.

Tiles = 18 * 18

Tiles = 324 tiles

17

step-by-step explanation:

c.

step-by-step explanation:

substitution for (0,1)

y=x^2+4x+1

1=0^2+4(x)0+1

1=0+4(x)0+1

1=4(x)0+1

1=0+1

1=1

substitution for (-3,-2)

y=x+1

-2=-3+1

-2=-2