A brick weighs 3 pounds plus half a cannonball. A cannonball weighs 3 pounds plus half a brick. A computer weighs a brick and a half plus a cannonball and a half. How much does the computer plus the brick plus the cannonball weigh?
First correct answer gets 10 points.
2006-07-02 05:29:19 · 18 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Chx gets the points. He got the first correct answer.
2006-07-02 05:40:19 · update #1
30 pounds
brick = 6 lb
so does connon ball
compy = 18
2006-07-02 05:37:04 · answer #1 · answered by Chx 2 · 5⤊ 2⤋
Let B=brick,c=cannonball,com=computer,P=pounds
if B=3P+1/2 X C
C=3p+1/2 X B
COM=(B+1/2 XB)+(C+1/2 X C).
:. COM+B+C=12P+3.5 of C
OR 22.5P+3.5 of B.
That's to say that,the computer ,the Birck and the cannonball will weigh 12 pounds plus 7/2 of cannonball or 45/2pounds plus 7/2 of BRICK..
2006-07-02 14:02:19 · answer #2 · answered by Raywise 1 · 0⤊ 0⤋
30 lbs
here's the equation
assume brick=x
cannonball=y
computer=z
the three equations are:
x=3+1/2y
y=3+1/2x
z=1 1/2x + 1 1/2y
solve for x,y, and z.
x=6
y=6
z=18
18+6+6=30
2006-07-02 12:46:09 · answer #3 · answered by absolutmex 2 · 0⤊ 0⤋
30 pounds
2006-07-02 13:53:19 · answer #4 · answered by Anonymous · 0⤊ 0⤋
30 pounds
2006-07-02 12:38:12 · answer #5 · answered by 1234abcd 2 · 0⤊ 0⤋
18 pounds
2006-07-02 16:35:34 · answer #6 · answered by Archangel 4 · 0⤊ 0⤋
30 lbs
2006-07-02 12:37:33 · answer #7 · answered by Anonymous61245 3 · 0⤊ 0⤋
a lot? I would probably be able to answer that during the school year but i think my brain shuts down over the summer. LOL
2006-07-02 13:22:03 · answer #8 · answered by mm4life33 2 · 0⤊ 0⤋
18 lbs
2006-07-02 12:38:22 · answer #9 · answered by summer_gurl_92 2 · 0⤊ 0⤋
30 pounds. I'm in 5th grade.
2006-07-02 13:44:18 · answer #10 · answered by johnnyztang 2 · 0⤊ 0⤋