2007-09-27 05:56:48 · 23 answers · asked by chloe 1 in Science & Mathematics ➔ Engineering
27 lbs?
2007-09-27 06:00:46 · answer #1 · answered by turtlemaster 1 · 1⤊ 3⤋
1 brick = 9 lb (rock) + 1/2 brick
remove 1/2 brick from both sides
1/2 brick = 9 lb
so 1/2 brick is 9 lbs but you want to know about a brick and a half which is 3 half bricks
so 3 times 9 lbs = 27 lbs
2007-09-27 06:02:26 · answer #2 · answered by Anonymous · 3⤊ 3⤋
27 pounds. 9 lbs is half the weight of a brick. Your question is how much does 3 half bricks weigh. 9 x 3 = 27
2007-09-27 06:02:06 · answer #3 · answered by aswkingfish 5 · 2⤊ 3⤋
Interesting. A brick weighs 9 lbs + half it's weight, which implies that 9 lbs is half weight. Therefore, a brick weighs 18 lbs.
So a brick and a half would weigh 27 lbs.
2007-09-27 06:07:12 · answer #4 · answered by Marc X 6 · 2⤊ 3⤋
27 lbs.
9 lb rock weighs as much as 1/2 a brick. 9 lbs x3 (1.5 bricks) = 27
2007-09-27 06:01:04 · answer #5 · answered by Lorien C 3 · 4⤊ 2⤋
brick = 9 + 1/2brick
Multiply both sides by 2 to get:
2brick = 9 + brick
2brick - brick = 9
brick = 9
1/2brick = 4.5
brick + 1/2brick = 13.5 lbs
2007-09-27 06:09:15 · answer #6 · answered by ctleng76 5 · 0⤊ 5⤋
Weight of brick = x
x = 9 + x/2
x-x/2 = 9
2x-x=18
x=18
1.5 * 18 = 27
2007-09-27 06:02:54 · answer #7 · answered by Barkley Hound 7 · 2⤊ 3⤋
3 rocks.
Interesting how many people got this wrong (all you 13.5 people). What the heck are you all doing answering math questions? Go over and answer fashion questions instead.
2007-09-27 20:03:23 · answer #8 · answered by Firebird 7 · 0⤊ 0⤋
13.5 pounds + 3/4 of a brick
2007-09-27 08:26:52 · answer #9 · answered by gatorbait 7 · 0⤊ 4⤋
1 brick = 9 + (9/2) = 13.5
half brick = 13.5/2 = 6.75
Therefore one and half bricks weigh 20.25lb
(When you get your brick and rock, let me know!)
2007-09-27 06:08:35 · answer #10 · answered by Sherry 3 · 0⤊ 5⤋
27 lb
2007-09-27 05:59:40 · answer #11 · answered by Anonymous · 3⤊ 3⤋