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Harlamova29_29 [7]
3 years ago
10

6x^2 – 13x + 6 = 2x^2 solve using quadratic formula

Mathematics
1 answer:
Zanzabum3 years ago
5 0

Answer:

x=\frac{13\pm\sqrt{73} }{8}

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS
  • Equality Properties

<u>Algebra I</u>

  • Standard Form: ax² + bx + c = 0
  • Quadratic Formula: x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}

Step-by-step explanation:

<u>Step 1: Define equation</u>

6x² - 13x + 6 = 2x²

<u>Step 2: Rewrite in Standard Form</u>

  1. Subtract 2x² on both sides:                    4x² - 13x + 6 = 0

<u>Step 3: Define</u>

a = 4

b = -13

c = 6

<u>Step 4: Solve for </u><em><u>x</u></em><u>/roots</u>

  1. Substitute:                              x=\frac{13\pm\sqrt{(-13)^2-4(4)(6)} }{2(4)}
  2. Exponent:                               x=\frac{13\pm\sqrt{169-4(4)(6)} }{2(4)}
  3. Multiply:                                  x=\frac{13\pm\sqrt{169-96} }{8}
  4. Subtract:                                 x=\frac{13\pm\sqrt{73} }{8}

And we have our final answer!

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Suppose you need to get the dent in your car fixed. You see the ads in the newspaper above (mikes repair shop $100 service charg
Norma-Jean [14]

Answer:

<em>Total Cost at Amy's shop is $280 which is less than the total cost at Mike's shop which is $295, so I will take the car to Amy's shop</em>

<em>Point of intersection: (x,y) = (4,360)</em>

Explanation:

Part 1 )

Let x = number of hours worked

Let y = total cost to you

Determining where to take the car:

<em>Total Cost at Amy's shop is $280 which is less than the total cost at Mike's shop which is $295</em>

Mike's repair shop:

Service fee: $100

Per hour rate: $65

Let x is the number of hours worked on. Total cost will be equal to the service fee plus hourly charges. Charges per an hour are $65, so for x hours the charges will be 65x.

Therefore, total cost for Amy's repair shop can be written as:

y = 100 + 65x ------(1)

For 3 hours work: y = 100 + 65(3)

<em>Cost at Mike's, y = $100 + $195 = $295</em>


<em>Amy's repair shop: </em>

Service fee: $40

Per hour rate: $80

Charges per an hour are $40, so for x hours the charges will be 80x.

Therefore, total cost for Amy's repair shop can be written as:

y = 40 + 80x ------(2)

For 3 hours work: x = 3

y = 40 + 80(3)

<em>Cost at Amy's, y  = $40 + $240 = $280</em>


<em>Part 2)</em>

<em>Find the point of intersection</em>

<em>Using elimination method:</em>

<em>y = 100 + 65 x    ------1</em>

<em>y = 40 + 80x      ------2</em>

<em>As the y coefficients are equal we will subtract eq1 from eq2</em>

<em>y - y = 40 + 80x - 100 - 65x</em>

<em>0 = -60 + 15x</em>

60 = 15x

x = \frac{60}{4}

x = 4

put x = 4 in eq 1

we get y = 100 + 65 (4) = 100 + 260 = 360

x = 4, y = 360

Point of intersection: (x,y) = (4,360)



8 0
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Is what I did correct if not then what is the answer
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Answer:

Yes it is correct

Step-by-step explanation:

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Answer:

0.17

Step-by-step explanation:

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Since the area of the triangle is base * height / 2 or  4 * 3/2 = 6, the probability is 6/35. Plugging this value in the calculator gives us 0.17

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