Paola translated trapezoid ABCD four units to the right and two units up. If angle A is 57° and angle C is 123°, what is the degree measurement of angle C′?

180°

123°

66°

57°

Antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?