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Leona [35]
3 years ago
6

Car leases generally allow only a certain number of miles to be driven. Myung’s lease included a charge of 25 cents per mile for

all miles above 12,000 per year. If Myung had a 3-year lease and was charged $1,640 at the end of the lease, how many miles had she driven during the 3 years?
Mathematics
2 answers:
KengaRu [80]3 years ago
6 0

Answer:

197

Step-by-step explanation:

Divide 1640 by 25

1640/25=65

Then multiply 65 and 3

65x3=197

labwork [276]3 years ago
5 0
6560 if you divide 25 into that you get the answer
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What is 2/3x + 1/3 - 1/3x
Solnce55 [7]

Answer:

1/3x  +1/3

Step-by-step explanation:

2/3x + 1/3 - 1/3x

Combine like terms

2/3 x - 1/3x     +1/3

1/3x         +1/3

6 0
3 years ago
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Do (6x12)/2, that should work
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3 years ago
The number 629 divided by the number c equals 17
Alex Ar [27]

Answer:

629/c=17

629=17c

Divide both sides by 17

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7 0
3 years ago
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Theresa Morgan a chemist has a 10% hydrochloric acid solution and a 65% hydrochloric acid solution. How many liters of each shou
prisoha [69]

<u>ANSWER: </u>

170 liters of 10% hydrochloric acid must be mixed with 1700 liters of 65% hydrochloric acid solution to obtain 1870 liters of 60% solution.

<u>SOLUTION: </u>

First, set up a table. Fill in the unknowns with variables x and y. The table is attached below

From this, we can easily set up the two equations.  

Sum of values of two acids = Value of mixture  

0.1x + 0.65y = 1122  

For convenience, we'll multiply the entire equation by 100,

10x + 65y = 112200   ------ (1)  

Now, Sum of amounts of each acid = Amount of mixture  

x + y = 1870  ---------(2)

multiply (2) with 10 for easy calculation and derive the equation into one variable.

10x + 10y = 18700  

Subtracting equation (2) from (1),  

( + ) 10x + 65y = 112200

( − ) 10x + 10y = 18700

we get the solution as,

0 + 55y = 93500

Thus, 55y = 93500

y = 1700

Substituting y = 1700 in (2),

x + 1700 = 1870  

x  = 1870 - 1700  

x  = 170  

So, we have x = 170 and y = 1700

We can conclude that 170 liters of 10% hydrochloric acid must be mixed with 1700 liters of 65% hydrochloric acid solution  to obtain 1870 liters of 60% solution.

4 0
3 years ago
A population of 100 frogs increases at an annual rate of 22%. How many frogs will there be in 5 years? Write an expression to re
gizmo_the_mogwai [7]
Exponential growth of the form:

F=Ar^t

F=100(1.22)^t

F(5)=100(1.22)^5

F(5)=270.27

F(5)=270 to the nearest frog...

....

1.22=r^12

r=1.22^(1/12)

F=100(1.22^(1/12)^t)

F=100(1.22^(t/12))  now it will produce monthly populations...

Say we did the same as before but instead of 5 years you have 60 months...

F(60)=100(1.22^(60/12))

F(60)=270 to the nearest frog... :P 
6 0
3 years ago
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