A tourist from Germany converted 2200 Euros (€) into US Dollars (U) when the exchange rate was x € to $1U.

a) Write down an expression for the number of dollars she received.

In August, the tourist converted a further 2200 euros unto US dollars, but the rate of exchange had now altered to (x-0.2) € to $1U.

b) write down an expression for the number of dollars she received in this transaction.

The tourist received $100 more in August than in July;

c) write down an equation, in terms of x, to represent this difference. Show that it simplifies to 5x^2 -x-22=0.

Question

A tourist from Germany converted 2200 Euros (€) into US Dollars (U) when the exchange rate was x € to $1U.

a) Write down an expression for the number of dollars she received.

In August, the tourist converted a further 2200 euros unto US dollars, but the rate of exchange had now altered to (x-0.2) € to $1U.

b) write down an expression for the number of dollars she received in this transaction.

The tourist received $100 more in August than in July;

c) write down an equation, in terms of x, to represent this difference. Show that it simplifies to 5x^2 -x-22=0.