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guajiro [1.7K]
3 years ago
9

the price of a box of cereal was $2.00 at the beginning of a year.At the end of the year, the price of a box of the same type of

cereal was $3.00.What was the percent increase in the price of the box of cereal?
Mathematics
1 answer:
Step2247 [10]3 years ago
8 0
The percentage increase is 50% because 3/2=1.5
1.5-1=0.5 (1 is the same as saying the original 100%)
0.5 as a percentage is 50%

Hope this helps :)
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Kim took out a $55,000 loan for college. She is borrowing money from two banks. Bank A charges an interest rate of 8%, and Bank
stellarik [79]
Kim's Loan:
Let A =  amount borrowed from bank A.
Let B =  amount borrowed from bank B.

The total loan is $55,000.
Therefore
A + B = 55000                  (1)

Bank A charges 8% interest. The interest after 1 year is 0.08A.
Bank B charges 11% interest. The interest after 1 year is 0.11B.
Total interest after 1 year is $5,000.
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0.08A + 0.11B = 5000      (2)

From (1), obtain
B = 55000 - A                  (3)

Substitute (3) into (2).
0.08A + 0.11(55000 - A) = 5000
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Answer:  Kim borrowed $35,000 from bank A.

Jack's Loan.
A = loan from bank A.
B = loan from bank B.
The total loan is $10,000.
Therefore
A + B = 10000                  (4)

Bank A charges 5% interest and bank B charges 6% interest.
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From (4), obtain
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Substitute (6) into (5).
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\text{Therefore the equation is}\ f(x)=\dfrac{3}{2}x-1\\\\\text{Check for  the point (4, 5):}\\\\f(4)=\dfrac{3}{2}(4)-1=(3)(2)-1=6-1=5\qquad\ CORRECT

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