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gtnhenbr [62]
4 years ago
14

I really suck at math. please help =)

Mathematics
1 answer:
FrozenT [24]4 years ago
6 0
Check the picture below.

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Answer:

Correct answer is B. -3 • 5 = - 15

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2 years ago
Solve for x I need help again :/
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The Angles depicted 38° and (6x + 2)° are equal because they form vertical opposite Angle pair.

so,

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Read 2 more answers
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.

5 0
3 years ago
Manuel bought x x movie tickets for $6.50 each and y y bags of popcorn for $2.50 each. write an algebraic expression for the tot
Alekssandra [29.7K]
6.50x+2.50y = total 
with x = # of movie tickets 
with y= # of bags of popcorn
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4 years ago
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