Which expression is equivalent to (7+4i) +(8+i) 1. 15-5i
2. 15+5i
3. 5+0i
4. 20+0i

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.

Find the exact value of each of the following. in each case, show your work and explain the steps you take to find the value. (a) sin 17π/6 (b) tan 13π/4 (c) sec 11π/3

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.