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boyakko [2]
3 years ago
15

1.What values of a,b,and c would you use in the quadratic formula for the following equation?

Mathematics
1 answer:
SCORPION-xisa [38]3 years ago
6 0
First, rearrange the quadratic equation:
5x² + 9x - 4 = 0

Now, compare it to the general quadratic equation:
a<span>x² + bx + c = 0

Therefore you get:
a = +5
b = +9
c = -4

And the quadratic formula will be:

x = [-b +/- </span>√(b² - 4ac)] / 2a
   = [ -5 +/- √(81 - 4·5·(-4))] / 2·5
   = (-5 +/- √161) / 10

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Find the amount in an account if 7,650 is invested at 9.15 percent compounded quarterly for 8 years and 6 months
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We have been given that in an account an amount of 7,650 is invested at 9.15 percent compounded quarterly for 8 years and 6 months.

We will use compound interest formula to find our answer.

A=Pcdot(1+\frac{r}{n}) ^{nT},

Where, P= principle amount, A= amount after T years, n= period of compounding and r = interest rate (decimal).

Let us substitute our given values in our formula.

A=7650(1+\frac{0.0915}{4} )^{(8.5\times4)}  

A=7650(1+0.022875)^{34}

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A=7650\cdot 2.15758136398

A=16505.4974    

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7 0
3 years ago
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Answer:

  y-intercept: (0, 5/2)

  x-intercept: (5/3, 0)

Step-by-step explanation:

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The x-intercept is found by setting y=0 and dividing by the coefficient of x.

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The intercepts are ...

  y-intercept: (0, 5/2)

  x-intercept: (5/3, 0)

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Step-by-step explanation:

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