Solve 3(a + 3) – 6 = 21. Write a reason for each step.

Assume cd | ab are parallel. find m2. a) x= 50° (b) x = 70° c) x = 30° d) x = 60

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

What will the graph look like for a system of equations that has no solution? a. the lines will be perpendicular. b. the lines will cross at one point. c. both equations will form the same line. d. the lines will be parallel.