QUICK!! TEN POINTS AND BRAINLIEST FOR WHOEVER GETS IT RIGHT! What is the distance between (5, -1) and (5, 4)?

O 1 unit
O 3 units
O4 units
O 5 units

Find the difference (8ab+a+2) - (3ab+6)

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)

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.