Suppose 13-years and 17-year, anc cicadas both appear this year. when will both typed of cicadas next appear together?

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

What is the value of x in the following equation? -3x-2=2x+8

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.