19. given that the lines are parallel, what angle is congruent to angle 6?
20. given that the lines are parallel, what angles are congruent to angle 1?
21. the types of geometry that mathematicians study are:
a. euclidean
b. non-euclidean
c. both euclidean and non-euclidean
d. there are many types

22.using the figures below, what is the next shape in the pattern?

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)

Ascientist places 24 cells in a petri dish. she knows the cells grow at an exponential rate, doubling in number every hour. how long will it take (in hours) for there to be 1100 cells in the dish? time to 1100 cells: 5.51832530 hours how long will it take to reach 110 cells? time to 110 cells : 2.1963972 hours what is the average rate of change in the number of cells between 9 hours and 11 hours? average rate of change: cells per hour what is the instantaneous rate of change after 7 hours? instantaneous rate of change: cells per hour note: you can earn partial credit on this problem.