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Andrews [41]
3 years ago
9

dr. lee went to a bank to get a loan for some new furniture for the waiting area at her clinic. she wanted to borrow $5,000 to b

e paid back over 3 years. last week the interest rate was 4.25%. but this week theinterest rate went up to 4.50%. how much additional interest will Dr. lee pay because she waited the extra week
Mathematics
1 answer:
IgorC [24]3 years ago
4 0
5000*(4.50%-4.25%)= 5000*0.25%=12.5 dollars

additional interest is 12.5 dollars.
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Solve the system by using the technique of ‘elimination’: -2x+5y=-42,7x+2y=30
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Solve the following system using elimination:

{5 y - 2 x = -42 | (equation 1)

7 x + 2 y = 30 | (equation 2)

Swap equation 1 with equation 2:

{7 x + 2 y = 30 | (equation 1)

-(2 x) + 5 y = -42 | (equation 2)

Add 2/7 × (equation 1) to equation 2:

{7 x + 2 y = 30 | (equation 1)

0 x+(39 y)/7 = (-234)/7 | (equation 2)

Multiply equation 2 by 7/39:

{7 x + 2 y = 30 | (equation 1)

0 x+y = -6 | (equation 2)

Subtract 2 × (equation 2) from equation 1:

{7 x+0 y = 42 | (equation 1)

0 x+y = -6 | (equation 2)

Divide equation 1 by 7:

{x+0 y = 6 | (equation 1)

0 x+y = -6 | (equation 2)

Collect results:

Answer: {x = 6, y = -6

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Answer:

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Step-by-step explanation:

<u>Solving as normal quadratic equation:</u>

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  • x^2 +x = 6
  • x^2 + x - 6= 0
  • x = (-1 ± √(1+4*1*6)/2
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Step-by-step explanation:

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Answer:

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Solve one of the variables and substitute the answer for the other variable.

Select one of the problems and solve for x.

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Multiply 1/3 by -y + 27.

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Replace -y/3 + 9 for x in the other problem 3x-2y=0.

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Subtract 27 from both sides of the problem.

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Replace 9 for y in x=−1/3​y+9.

x=−1/3*9+9

Multiply −1/3​ times 9.

x=-3+9

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