What the value of t in this equation
4t+6=5

Find the value of x for which abcd must be a parallelogram -9-6x x-30

Which of the following expressions is equal to 2x^2+8

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)