What are the coordinates of the vertex of the parabola described by the equation below?y = -7(x - 4)2 - 5 A.(-4, 5)
B.(4, -5)
C.(-5, -4)
D.(5, 4)

What could explain what happened when the time was equal to 120 minutes

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)

Evaluate 3(a + b + c)squared for a = 2, b = 3, and c = 4. a. 54 b. 243 c.729 add solution .