Write a statement that indicates that the triangles in each pair are congruent. I only need 18, 19, and 22 answered.

What are correct trigonometric ratios that could be used to determine the length of ln

For a field trip to the zoo, 4 students rode in cars and the rest filled nine busess. how many students were in each bus if 472 students were on the trip

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.