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y - 2x = 3 x² + y² = 18Step 1- re-arrange the first formula to find y: y = 3 + 2x Step 2- Substitution: x² + ( 3 + 2x )² = 18 Step 3- Expand the brackets: ( 3 +...

Pronouns are words that we put before a verb to replace a noun or object. In French there are direct and indirect object pronouns and often it seems difficult to know how to use them. The direct object pr...

In both the Renaissance period and the 19th-century surgery and anatomy advanced and new approaches were used. For example, in the Renaissance period, Paré developed ligatures and lotion to seal wounds; t...

Thermoregulatory homeostasis helps to maintain the core body temperature at 37 degrees Celsius.When we are too hot the body's sweat glands secrete sweat onto the skin which then evaporates, allowing us to...

There are two main reasons why Tsar Nicholas II abdicated in February 1917, leaving behind a Provisional Government. The first reason is the First World War. The second, interrelated reason is Russia's we...