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by 3/1/2*1/1/2, you probably mean 3/(1/2)*1/(1/2) which is 6*2 = 12.

I'm sure you know the equation for a circle is (x-h)^2 + (y-k)^2 = r^2. Also the center is represented by (h,k).

In you situation -4 is h and -9 is k, also r is 10. Simple plugging in from this point. Give me your answer and I'll see if it's correct or not.

well, this is about GRAM'S NUMBER!!!

wow...i dont think i can solve that....I AM IN MY LAST MIDDLE SCHOOL YEAR!!!! THAT IS WAYYYYYYYYY TO HARD!!!!

I did it because:

It would block out some of my writing, and of course, I would not like that.

Way "to" big?  

Just because this is a math forum doesn't mean that proper spelling has vanished.

Is 20 squared + 20 squared the same as 40 squared ?

No!

20² + 20² = 20 * 20 + 20 * 20 = 400 + 400 = 800

40² = 40 * 40 = 1600

H

1/2ac = sq ft

ac = sq ft

1.0 = 43560
2.0 = 87120
3.0 = 130680
4.0 = 174240
5.0 = 217800
6.0 = 261360
7.0 = 304920
8.0 = 348480
9.0 = 392040

1/2 ac = 0.5 x 43560 sq ft

1/2 ac = 21780 sq ft

Okay :).

24 cannonballs x 137.5% = 33 cannonballs

-4 times -4 is sixteen, just as 4 times 4 is sixteen.

[-40] + [-75] + [100] + [200] = 300 - 115 = 185

9 plus 7 is sixteen.

9 multiplied by 7 is 63.

The answer is: b) (x+8)(x+9)

Factor the following:
-80 k^2+144 k-96+120^3

120^3 = 120×120^2:
-80 k^2+144 k-96+120×120^2
-80 k^2+144 k-96+14400 120

120×14400  =  1728000:
-80 k^2+144 k-96+1728000

Grouping like terms, -80 k^2+144 k-96+1728000 = -80 k^2+144 k+(1728000-96):
-80 k^2+144 k+(1728000-96)

1728000-96 = 1727904:
-80 k^2+144 k+1727904

Factor -16 out of -80 k^2+144 k+1727904:
Answer: |   -16 (5k^2 - 9k - 107994)

the answer is b

1/5*300 = 60

-3 is the answer