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skad [1K]
3 years ago
5

Dean and karlene get paid to write songs. Dean is paid a one-time fee of $20 plus $80 per day. Karlene is paid a one-time fee of

$25 plus $100 per day. Write an expression to represent how much a producer will pay to hire both to work the same number of days on a song.
Mathematics
1 answer:
sattari [20]3 years ago
8 0

Answer:

let d be the number of the days and c the cost to hire both of them

c=45+180d

Step-by-step explanation:


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65

Step-by-step explanation:

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Area of Triangle:
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Answer:

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Find a quadratic polynomial with integer coefficients which has x = 2/9, ± SQRT23/9 as its real zeros.
melomori [17]

Answer:

The quadratic polynomial with integer coefficients is y = 81\cdot x^{2}-36\cdot x -19.

Step-by-step explanation:

Statement is incorrectly written. Correct form is described below:

<em>Find a quadratic polynomial with integer coefficients which has the following real zeros: </em>x = \frac{2}{9}\pm \frac{\sqrt{23}}{9}<em>. </em>

Let be r_{1} = \frac{2}{9}+\frac{\sqrt{23}}{9} and r_{2} = \frac{2}{9}-\frac{\sqrt{23}}{9} roots of the quadratic function. By Algebra we know that:

y = (x-r_{1})\cdot (x-r_{2}) = x^{2}-(r_{1}+r_{2})\cdot x +r_{1}\cdot r_{2} (1)

Then, the quadratic polynomial is:

y = x^{2}-\frac{4}{9}\cdot x -\frac{19}{81}

y = 81\cdot x^{2}-36\cdot x -19

The quadratic polynomial with integer coefficients is y = 81\cdot x^{2}-36\cdot x -19.

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3 years ago
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14+2x=4x: divide 2x on each side

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7

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