2007-01-20 02:18:54 · 14 answers · asked by corylingard 2 in Science & Mathematics ➔ Mathematics
A brick weighs 30 pounds plus half a brick:
b = 30 + 1/2b
1/2b = 30
b = 60
(Which is obvious, really, because 1/2 a brick must equal 30 pounds in order for the two things to add up to a whole brick.)
Then a brick and a half is 3/2 of a brick:
3/2b = 90 pounds.
If I understand the problem correctly.
2007-01-20 02:22:26 · answer #1 · answered by Jim Burnell 6 · 2⤊ 1⤋
1 brick weigh 30 pounds and half a brick
Therefore 1/2 brick weighs 30 pounds
and 1 1/2 brick weigh 30X3=90 pounds
2007-01-20 02:28:36 · answer #2 · answered by alpha 7 · 2⤊ 1⤋
If a brick weighs 30 pounds and half a brick, a brick and a half weigh 30 pounds and a brick.
2007-01-20 03:23:18 · answer #3 · answered by Pearlsawme 7 · 0⤊ 2⤋
Let B=brick,c=cannonball,com=computer,P=poun... 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..
2016-03-29 06:05:50 · answer #4 · answered by Anonymous · 0⤊ 0⤋
That's so easy, if a brick weighs 30 lbs., and a half a brick weighs 15lbs. Add those two weights together and unless I'm mistaken, the total comes to a full 45lbs.
2007-01-20 02:23:33 · answer #5 · answered by Ferris N. Wilcox, Jr 2 · 1⤊ 2⤋
90 lbs
Brick = x
x = 30 + 1/2x
x - 1/2x =30
1/2x = 30
x - 60
60 x 1 1/2 = 90
2007-01-20 02:46:35 · answer #6 · answered by quatt47 7 · 1⤊ 1⤋
45 pounds
2007-01-20 02:26:27 · answer #7 · answered by Anonymous · 0⤊ 1⤋
60 pounds
2007-01-20 02:26:15 · answer #8 · answered by Junun 2 · 0⤊ 1⤋
45 lbs
2007-01-20 02:27:48 · answer #9 · answered by nuttin'fancy 5 · 0⤊ 1⤋
30 x1.5=45
2007-01-20 02:43:04 · answer #10 · answered by Dave aka Spider Monkey 7 · 0⤊ 1⤋