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Imagine we have a wave that is travelling from left to right. This is the wave's direction of motion, or what is sometimes called the direction of "energy propagation". In a transverse wave the ...

Demand is the total amount of goods and services that consumers are willing and able to purchase at a given price in a given time period. The Law of Demand states that as the price of a p...

To solve this, we need to factorise the expression (write as a product of two brackets). To do this we want to find to numbers that multiply to make +6 and add up to -5, for this case. These numb...

We know that the question is asking us to take the number 36 to the power of 0.5. By assumption 0.5 can be written as 1/2. To take 36 to the power of a 1/2 we take it to the root of the denominator and th...

zy=28 so y=28/z13=2z-3y13= 2z - (28 x 3)/z13=2z-84/zmultiply each side by z to give 13z = 2z²-84rearange for a quadratic2z²-13z-84=0solve by factorising(2z+8)(z-21/2)z= -4 0r 21/2sub...