Cho biểu thức: N=(x-a)(x-b)+(x-b)(x-c)+(x-c)(x-a)+ x^2. tính n theo a b c biết x=1/2a+1/2b+1/2c

50 ! pls ! 12.  building codes regulate the steepness of stairs. homes must have steps that are at least 13 inches wide for each 8 inches that they rise.

a. discuss how to find the slope of the stairs.
b. describe how changing the width or height affects the steepness of the stairs.

Which statement describes surface features called maria on the moon

Which statements are true about additional information for proving that the triangles are congruent check all that apply