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sweet [91]
4 years ago
6

Find the vertex of the graph of the function. f(x) = 2x2 - 8x + 9

Mathematics
1 answer:
Katen [24]4 years ago
8 0

Answer:

(2, 1).

Step-by-step explanation:

f(x)=2x^2-8x+9

Find -b/2a first, it's -(-8)/2(2)=8/4=2.

Then find the y-coordinate of the vertex.

2(2)^2-8(2)+9=2(4)-16+9=8-16+9=-8+9=1

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Amy opened a savings account with $1750 she received for graduation. The account pays 4.3% simple interest. What is the balance
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Given:

  • The principal amount that Amy opened her savings account with is $1750.
  • The rate of simple interest compounded annually is 4.3%.
  • The time period for which we calculate the new balance is 6 months.

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The balance after 6 months.

Answer:

The balance after 6 months will be $1787.625

Step-by-step explanation:

The principal amount that Amy opened her savings account with is $1750. We can denote this by P.

The rate of simple interest compounded annually is 4.3% which we may denote by R.

The time period for which we calculate the new balance is 6 months which can be written as 0.5 years (since the rate of interest is compounded annually, we must consider the time period in terms of years).

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Putting in the values given in the question, we have

\frac{(1750)(4.3)(0.5)}{100} = 37.625

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Thus, the balance after 6 months will be 1750 + 37.625 = $1787.625.


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