Simplify. 12k - 6 + (3k)(4) is it -6, 6, 24k + 6, or 24k - 6?

its actually super easy, but i am kind of confused. : t

List the sides of δrst in in ascending order (shortest to longest) if: a ∠r =x+28°, m∠s = 2x+16°, and m∠t = x+12°

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?