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Marizza181 [45]
3 years ago
6

At currency exchange, 11 U.S. Dollars can be exchanged for 10 Euros. How many euros will you recevie for 1 U.S. Dollar?

Mathematics
2 answers:
Anna71 [15]3 years ago
8 0
So you know that 11 U.S. Dollars can be exchanged for 10 Euros which is 10/11. To figure out how many Euros you will receive for 1 Dollor you have to find the unit rate. To do this divide 10 by 11. The answer is 0.90
Paladinen [302]3 years ago
8 0

Answer:

0.91 Euros

Step-by-step explanation:

We know that 11 U.S. Dollars can be exchanged for 10 Euros. We know that exists a linear relationship between the amount of U.S Dollars and the amount of Euros. This linear relationship can be written as :

\frac{11(U.S.Dollars)}{10(Euros)}=\frac{1(U.S.Dollars)}{x}

If we solve the equation for x :

x=\frac{1(U.S.Dollars).10(Euros)}{11(U.S.Dollars)}=\frac{10}{11}(Euros)

x=0.9090(Euros) ≅ 0.91 Euros

We find that for 1 U.S.Dollar I will receive 0.91 Euros.

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Okay, just break it up so you're not overwhelming yourself or anything :)
So here, do it in steps-

Let's do 5(3 + t) first:
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Now onto -3(t + 1):
Again, just multiply -3 by t and 1. This will come out to: -3t - 3.

*Note: the 3 is negative because it's "MINUS 3" in the original equation and remember that any number times a negative, if it isn't negative itself, will turn out to be negative.... (aka "-" x "-" = "+" | "+" x "+" = "+" | "-" x "+" = "-")*

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Now just put both answer together and you get:
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