Answer:
81(x + 2y)(x - 2y)
Step-by-step explanation:

Answer:
52
Step-by-step explanation:
62 - 42 = 20
20 / 2 = 10
42 + 10 = 52
52... i think :\
Answer:
yes
Step-by-step explanation:
euhm ... did u just asked if a figure with h=9inches and b=12inches is rectangular???
Does it matter what the diagonals are etc?
if the frame has angles of 90° and it has two different lengths then it has to be rectangular. The sides of a square would have the same lengths.
Answer:
$2250
Step-by-step explanation:
30 x 25 = 750 -> area
750 x 3= 2250
<span>for y varies directly with x, you should have
y=kx
where k is constant of variation.ok</span>