159k views
5 votes
On a certain day, the exchange rate was 60 U.S. dollars for 50 euro. How many U.S. dollars were 70 euro worth that day? Show that your answer is reasonable.

2 Answers

3 votes
60 / 50 = x / 70....60 U.S. to 50 euro = x U.S to 70 euro
cross multiply because this is a proportion
(50)(x) = (70)(60)
50x = 4200
x = 4200/50
x = 84 <== so 84 U.S dollars = 70 euros

proportions are nothing but equivalent fractions..
60/50 = 1.2
84/70 = 1.2
and as u can see, these are equivalent....so this is reasonable
User Simbi
by
8.6k points
4 votes
the exchange rate is 60:50 (us:euro)

if you have 70 euros, then x:70

60(x) : 70(50)

60x /60 : 3500/60

x = 58.33

seventy euro dollars = $ 58.33 on that particular day


hope this helps
User Xdissent
by
7.7k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories