What is 1 + 3(x + 7) simplified

Ethan is proving that the slope between any two points on a straight line is the same. he has already proved that triangles 1 and 2 are similar. drag statements and reasons to complete the proof.

Factor 15x^3 - 5x^2 +6x-2 by grouping. what is the resulting expression

Radials are weird[tex](14 \sqrt{6}) ^{2} [/tex]whats the answer and how do i solve pls