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wel
3 years ago
9

The scientific notation 2 x 10^-2 has what value?

Mathematics
1 answer:
PIT_PIT [208]3 years ago
8 0
The value is 0.02

If it is a negative number, you move the decimal over to the left. :)
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Solve the equation identify extraneous solutions
PIT_PIT [208]

Answer:

Step-by-step explanation:

The goal to solving any equation is to have x = {something}.  That means we need to get the x out from underneath that radical.  It's a square root, so we can "undo" it by squaring.  Square both sides because this is an equation.  Squaring both sides gives you

x^2=-3x+40

Get everything on one side of the equals sign and set the quadratic equal to 0:

x^2+3x-40=0

Throw this into the quadratic formula to get that the solutions are x = 5 and -8.  We need to see if only one works, both work, or neither work in the original equation.

Does 5=\sqrt{-3(5)+40}?

5=\sqrt{-15+40} and

5=\sqrt{25}

and 5 = 5.  So 5 works.  Let's try -8 now:

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-8=\sqrt{24+40} so

-8=\sqrt{64}

-8 = 8?  No it doesn't.  So only 5 works. Your choice is the third one down.

6 0
3 years ago
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Kryger [21]
3x3x3=27

So, there are 27 combinations.
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2 years ago
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A parabola whose equation is y = (x - 5)^2 - 2 has a vertex at _____.
katrin [286]
The vertex would be at (5,-2)
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3 years ago
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Can you please help me​
nika2105 [10]

Answer:

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Step-by-step explanation:

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Also you can easily get the answer without doing any math because you can see the angle is a right angle

Right angles equal 90

Hope this helps dude

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