Ineed on #4. i tried many things i’ve learned and it’s still not working.

The solution set for 5v2 – 125 = 0 is

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

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.