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Ira Lisetskai [31]
3 years ago
14

Simplify each expression -3m + 16 - (-13m) 15y - 20y + 15

Mathematics
1 answer:
posledela3 years ago
3 0

Answer:

10m + 16

-5y + 15

Step-by-step explanation:

-3m + 16 - (-13m) =

= -3m + 16 + 13m

= 10m + 16

15y - 20y + 15 =

= -5y + 15

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If a and b are the roots of the quadratic equation 2r + 6x -7 = 0, form the equation with the following causes.
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Answer:

Step-by-step explanation:

Assuming the given equation is actually 2x^2+6x-7=0.

Then \alpha +\beta=-\frac{6}{2} =-3,and,\alpha \beta=-\frac{7}{2}

The sum of roots of the new equation is \frac{1}{2\alpha+1} +\frac{1}{2\beta +1} =\frac{2(\alpha+\beta+1)}{4\alpha \beta+2(\alpha +\beta)+1}

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The product of the roots of the new equation is \frac{1}{2\alpha +1}*\frac{1}{2\beta+1}=\frac{1}{4\alpha \beta+2(\alpha+\beta)+1}

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The new equation is given by:

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x^2-\frac{4}{19} x-\frac{1}{19} =0

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4 years ago
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