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finlep [7]
3 years ago
11

Bryan is getting trained and licensed to be a truck driver.He only has $350 in his bank account. The training is free but gas co

sts 13 cents per mile. If he travels 1,254 miles , how much money will he have left in his bank account
A. 186.98

B.206.17

C.64.83

D.127.32
Mathematics
1 answer:
Alexxandr [17]3 years ago
6 0

The answer is A because .13 times 1254 miles equals 163.02 and if you subtract that from the 350 dollars in Bryan's bank account you get A 186.98

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First, let's organize the equations.

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Now, we'll solve one of (1), (2), and (3) for a variable. The choice is yours, but we'll use equation (3) and solve it for x.

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Now we put this into equation (1). Why (1)? It's the only one of (1) and (2) with x.

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Now look at this new equation - call it (4) and the original (2).

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This is a system of two equations and two variables. Either substitution or elimination works here - let's use elimination because of the -z and +z.

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Two down, one to go. Since we know z = 2, let's put it into (3) and find x. (Equation (1) with y = 5 works fine as well.)

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