How do I solve sin(4x)=sin(2x)?

In the 30-60-90 triangle below side s has a length of and side r has a length

Place the following steps in order to complete the square and solve the quadratic equation,

Kyle and elijah are planning a road trip to california. their car travels 3/4 of a mile per min if they did not stop driving, how many miles could kyle and elijah drive in a whole day? ? 1 day = 24 hours. plzzz i will give you 100 points