On the certain day, assume 103 yen (Japanese currency) is equivalent to value of 1 dollar, and 0.78 euro (European currency) is also equal in value to 1 dollar.
a) Write the formula which expresses number of yen, y , you can get in exchange for d dollars. (y is the number of yen, not value of a yen. Likewise d is number of dollars.)
b) Write the formula which expresses number of euros, u , you can get in exchange for d dollars.
c) Assume you wish a formula which expresses number of yen you can get in exchange for u euros. Which process will get that result?
A. Add both sides of equations and factor out d on right side
B. Solve for d in formula defined in part (a) and plug that result in for d in formula defined in part (b)
C. Set right sides of equations in parts (a) and (b) equal to each other
D. Solve for d in formula defined in part (b) and plug that result in for d in formula defined in part (a)
d) Explain the function g which represents how many yen you can get for u euros.