Out of 30 students in Mohammed's class, 40% are girls. How many are boys?

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

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)

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol