I've done this test before
The factor should be x+7 so, none of the above.
Hope I helped! ( Smiles )
12 x 12 x 11
12 x 12 = 144
144 x 11 = 1584
the answer is 1584 ! hope that helps :)
This isn't to diffuclt. So, to the formula for the area of a circle is

, or instead of r, you can put D, which is r times 2
The diameteris 2.5, so, the answer would be
pi times 2.5, where pie = 3.14
So, the answer is 2.5 * 3.14 = 7.85 or 7.9
6a-11=13
add 11 to both sides cross out -11 with +11
13+11 =24
6a=24
divide 6 on both sides
a= 4