Drivers of semitrucks and other large vehicles pay close attention to signs similar to the one below. these signs indicate a change in the grade or slope of the road. look at the black scalene triangle in the sign. 1. how can the third-angle theorem be applied to find all three angle measurements in the black triangle? 2. are the black triangles above congruent or similar? explain.

In the final round of trivia competition, contestants were asked to name as many states that begin with the letter m as they could in 15 seconds. the bar graph shows the number of states the contestants were able to name. how many contestants participated in the final round of the competition?

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

What number is 7 units left of -15?