For what value of x is the rational expression below undefined?
(3x-12)/(9-x)

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

1. are the corresponding angles congruent 2. find the ratios of the corresponding sides 3. is triangle jkl congruent to triangle rst? if so what is the scale factor

Which of the binomials below is a factor of this exression? 16x^2+40xy+25y^2 a.4x-5y b. 2x-5y c.4x+5y d.2x+5y