Help me with Number 10 ? Please

What are the values of , , m∠abd and m∠dbe in the given figure? explain or show your work

The graph shows the distance y, in inches, a pendulum moves to the right (positive displacement) and to the left (negative displacement), for a given number of seconds x. how many seconds are required for the pendulum to move from its resting position and return? enter your answer in the box.

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1