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Zepler [3.9K]
3 years ago
13

A vehicle uses 1 gallons of gasoline to travel 13 miles. At this rate, how many mile

Mathematics
1 answer:
Brrunno [24]3 years ago
6 0
1 gallon (it’s stayed in the question)
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Myra is a scientist and needs 45 gallons of a 16% acid solution. The lab is currently stocked only with a 20% acid solution and
asambeis [7]

Answer:

The volume of the solution with 20% acid is 27 gallons and the one with 10% acid is 18 gallons

Step-by-step explanation:

Myra needs to mix "x" gallons of the solution with 20% and "y" gallons of the solution with 10%. The volume of the final solution must be 45 gallons, therefore:

x + y = 45

The concentration of acid of the final solution is:

0.2*x + 0.1*y = 45*0.16

0.2*x + 0.1*y = 7.2

Therefore we have a system of equation:

x + y = 45

0.2*x + 0.1*y = 7.2

We need to multiply the first equation by -0.1:

-0.1*x -0.1*y = -4.5

0.2*x + 0.1*y = 7.2

We now sum both equation:

0.1*x = 2.7

x = 2.7/0.1 = 27 gallons

y = 45 - 27  = 18 gallons

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3 years ago
A deposit of 100 dollars is represented as?
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Answer:

represents the use of money as a ... savings deposits and small time deposits of less than $100,000.

Step-by-step explanation:

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