Please help, this makes no sense to me.

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

Manuela claims that and are congruent. which statement best describes her claim? she is incorrect because the segments do not have the same orientation. she is incorrect because the segments do not have the same length. she is correct because the segments have the same length. she is correct because the segments have the same orientation.

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)