Search over 10,000 free study notes

2x² - 2y = 282y - 4 = 12x
y - 2 = 6xy = 6x + 2
Substitute y = 6x + 2
2x² - 2(6x + 2) = 282x² - 12x - 4 = 282(x² - 6x - 2) = 28x² - 6x ...

The electron configuration is:{Ar]4s13d10Copper donates one of the electrons in its S orbital to the d orbital in order to make itself more stableCopper 2+ is [Ar]3d9The 4s electrons are lost first as the...

A wave cut platform is formed when softer rock at sea level is eroded by the processes of hydraulic action and abrasion. These processes erode the rock to create a notch in the rock, which is eroded furth...

A rise in interest rates increases the cost of borrowing and increases the reward for saving. This means that there is a double effect, people are disincentivised to borrow money and spend it, as well as ...

Call the two numbers x and y. The constraint is that x + y =100, and we need to maximise A=xy.
Rearrange the constraint to y = 100 - x, and substitute into the product equation.
A = x(100-x) = ...