Homework Help: algebra check please

Posted by sara on Monday, March 12, 2007 at 8:29pm.

a=-2 b=5 c=-4 d=6

question is
b^2-2bc+c^2

see if i did the steps right please

(5^2)-(2*5*-4)+(-4^2)
(5^2)-(10*-4)+(-4^2)
(5^2)-(-40)+(-4^2)
5^2-(-40)-4^2
25-(-40)-4^2
25+40-4^2
25+40-16
65-16
49

No. Minus four squred is positive sixteen.

eighty percent of 280 is what number?
draw a diagram of the problem

algebra check please - Bobby, Saturday, October 6, 2007 at 4:43pm
23
- algebra check please - Rita, Thursday, August 28, 2008 at 2:22pm
  2/3 (7/8 - 4x) - 5/8 = 3/8
  
  multiply 2/3 by 7/8 - 4x
  
  2/3 x 7/8 = 7/12
  
  2/3 x -4x = -8/3x
  
  7/12 - 8/3x - 5/8
  
  -1/24 - 8/3x = 3/8
  
  add -1/24 to both sides
  
  -8/3x = 3/8 + 1/24
  
  -8/3x = 5/12
  
  x = 5/12 / -8/3
  
  x = -15/96 or
  answer: x = -5/32
algebra check please - christina, Tuesday, December 16, 2008 at 5:48pm
9x-6=30
algebra check please - Angie, Monday, February 9, 2009 at 6:29pm
2x-3y=14 2x+y=-10

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