Jeannie got a new pair of eye glasses. She was able to pay $15 at the time she received her glasses. She will pay $12 each month on the
balance. The original cost of the glasses was $87.
b. How many months will it take Jeannie to pay for her glasses?

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.

Two trains leave a station on different tracks. the tracks make an angle of 130°, with the station as a vertex. the first train travels 100 km and makes its first stop at point a, while the second train travels 200 km and makes it first stop at point b. how far apart are the trains when both are at their first stop? round the answer to the nearest integer. a) 65 km b) 139 km c) 224 km d) 275 km