Plz Help! Given triangle abc, measurement of angle A=60, measurement of angle C=45, AB=8 units. Find the perimeter of triangle ABC

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

While scuba diving, rajeev dove to a depth of 12.6 feet below the surface of the water and then descended another 8.7 feet. what expression can be used to find rajeev's new position? 12.6 – 8.7 –12.6 – 8.7 –12.6 – (–8.7) 12.6 – (–8.7)

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?