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First we will need to factorise the equation.

Start with the 3x^2 term and notice 3 is prime so must have 3x and x terms.

(3x - 9) (x + 1) or  (3x + 3) (x - 3)

Setting the brackets to...

4x + 7y = 1 1. 3x + 10y = 15  2. 1. x 3 (4x x 3) + (7y x 3) = 1 x 3                       12x + 21y = 3  3. 2. x 4  (3x x 4) + (10y x 4) = 15 x 4                         12x + 40y = 60  4. 4. - 3.  (12x -...

The external intercostal muscles contract, pulling the ribs upwards and outwards. At the same time the muscles of the diaphragm contract, pulling the diaphragm down and causing it to flatten. Both of thes...

As the temperature has increased the particles have more kinetic energy which causes them to move more quickly so there are more collisions per unit time. Also, due to their increased kinetic energy, more...

1st multiply out the brackets:

y = 4x + 8 / 5x - 1

Next multiply both sides by the denominator onf the RHS:

y(5x-1)  = 4x + 8

Again, multiply out the brackets:

5xy - y =...