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emmasim [6.3K]
2 years ago
9

Last week DeShawn ran 31 kilometers less than Amanda. DeShawn ran 13 kilometers. How many kilometers did Amanda run?

Mathematics
2 answers:
schepotkina [342]2 years ago
6 0
31+13=44 miles ran by amanda
Lady_Fox [76]2 years ago
4 0
13 + 31 bro this is simple easy
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How many roots does this has?<br>x^2+(2√5x)+2x=-10​<br>find Discriminant
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Given:

The equation is

x^2+(2\sqrt{5})+2x=-10

To find:

The number of roots and discriminant of the given equation.

Solution:

We have,

x^2+(2\sqrt{5})x+2x=-10

The highest degree of given equation is 2. So, the number of roots is also 2.

It can be written as

x^2+(2\sqrt{5}+2)x+10=0

Here, a=1, b=(2\sqrt{5}+2), c=10.

Discriminant of the given equation is

D=b^2-4ac

D=(2\sqrt{5}+2)^2-4(1)(10)

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D=8\sqrt{5}-16

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Since discriminant is 8\sqrt{5}-16\approx 1.89, which is greater than 0, therefore, the given equation has two distinct real roots.

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