Azam buys the following items from an electrical wholesaler who then adds on VAT (20%): 6 plug sockets at £2.40 each.
Which option correctly calculates Azam's change in pounds from a £20 note?
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The variable in a relation who’s value depends on the value of the independent variable is called what?

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)

What is the expression in factored form? 3x^2 + 18x + 24 a. 3(x+2)(x+4) b. 3(x-2)(x+4) c. 3(x-2)(x-4) d. 3(x+2)(x-4)