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• Set up a rectangular coordinates system at the center of the circular path. The runner is called A & his friend is called B who is located on the +ve x- axis at a distance 260 m from the center O. A is somewhere on the circle at a distance s …

  in Please help Calculus problem!? Comment by pinkgreen June 2021
• ST=SR+RT=> 5x+3=3x-2+RT=> RT=5x+3-3x+2=> RT=2x+5

  in Geometry/algebra problem HELP? Comment by pinkgreen June 2021
• ST=SR+RT=> 5x+3=3x-2+RT=> RT=5x+3-3x+2=> RT=2x+5

  in Geometry/algebra problem HELP? Comment by pinkgreen June 2021
• r^3-6r^2+12r-8= (r^3-2^3)-6r(r-2)= (r-2)(r^2+2r+4)-6r(r-2)= (r-2)(r^2-4r+4)= (r-2)(r-2)^2= (r-2)^3 or use the formula: r^3-3(r^2)(2)+3r(2^2)-2^3= (r-2)^3

  in How do you factor: r^3 - 6r^2 + 12r - 8? Comment by pinkgreen May 2021
• Let N=ax+b, where a, b are constants. (5,100)=> 100=5a+b------(1) (7, 80)=> 80=7a+b-------(2) From (1) & (2) get a=-10, b=150 => (a) N=-10x+150 slope=-10=> for the increase of $1, there are reduction of 10 tee shirts in sa…

  in How to solve difficult algebra problem? Comment by pinkgreen May 2021
• Let N=ax+b, where a, b are constants. (5,100)=> 100=5a+b------(1) (7, 80)=> 80=7a+b-------(2) From (1) & (2) get a=-10, b=150 => (a) N=-10x+150 slope=-10=> for the increase of $1, there are reduction of 10 tee shirts in sa…

  in How to solve difficult algebra problem? Comment by pinkgreen May 2021
• (1) If I walk at 1 mph relative to the moving train & in the same direction, then I am traveling at 66 mph relative to the ground. (2) If I walk opposite to the direction of the moving train at 1 mph, then I am traveling at 64 mph relative to…

  in Hmm, Math word problem? Comment by pinkgreen May 2021
• (1) If I walk at 1 mph relative to the moving train & in the same direction, then I am traveling at 66 mph relative to the ground. (2) If I walk opposite to the direction of the moving train at 1 mph, then I am traveling at 64 mph relative to…

  in Hmm, Math word problem? Comment by pinkgreen May 2021
• Let N=ax+b, where a, b are constants. (5,100)=> 100=5a+b------(1) (7, 80)=> 80=7a+b-------(2) From (1) & (2) get a=-10, b=150 => (a) N=-10x+150 slope=-10=> for the increase of $1, there are reduction of 10 tee shirts in sa…

  in How to solve difficult algebra problem? Comment by pinkgreen May 2021
• r^3-6r^2+12r-8= (r^3-2^3)-6r(r-2)= (r-2)(r^2+2r+4)-6r(r-2)= (r-2)(r^2-4r+4)= (r-2)(r-2)^2= (r-2)^3 or use the formula: r^3-3(r^2)(2)+3r(2^2)-2^3= (r-2)^3

  in How do you factor: r^3 - 6r^2 + 12r - 8? Comment by pinkgreen May 2021