What is the only solution of 2x2 + 8x = x2 – 16?

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

What is the relationship between all triangles that can be drawn given the same three angles