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vaieri [72.5K]
3 years ago
11

What is the side length of a cube that has a volume of 0.008 m

Mathematics
1 answer:
Nataliya [291]3 years ago
8 0
Let the side lenght of cube is a
voluem of cube= 0.008
a^3=0.008
a =0.2
side of lenght is 0.2
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|x2+x-20<br> 22-11x+28<br> e:<br> x2-x-30<br> 3x-18
elena-s [515]

Answer:

x2 - 10x - 1994

Step-by-step explanation:

Step  1  :

Trying to factor by splitting the middle term

1.1     Factoring  x2-10x-1994

The first term is,  x2  its coefficient is  1 .

The middle term is,  -10x  its coefficient is  -10 .

The last term, "the constant", is  -1994

Step-1 : Multiply the coefficient of the first term by the constant   1 • -1994 = -1994

Step-2 : Find two factors of  -1994  whose sum equals the coefficient of the middle term, which is   -10 .

     -1994    +    1    =    -1993

     -997    +    2    =    -995

     -2    +    997    =    995

     -1    +    1994    =    1993

Observation : No two such factors can be found !!

Conclusion : Trinomial can not be factored

Final result :

 x2 - 10x - 1994

Processing ends successfully

plz mark me as brainliest :)

6 0
3 years ago
Show that cos(3x) = cos3(x) − 3 sin2(x)cos(x). (Hint: Use cos(2x) = cos2(x) − sin2(x) and the cosine sum
otez555 [7]

<u>Step-by-step explanation:</u>

To prove:

\cos 3x=\cos^3x-3\sin^2 x\cos x

Identities used:

\cos(A+B)=\cos A\cos B+\sin A\sin B      ......(1)

\sin 2A=2\sin A\cos A        ........(2)

\cos 2A=\cos^2A-\sin^2 A     .......(3)

Taking the LHS:

\Rightarrow \cos 3x=\cos (x+2x)

Using identity 1:

\Rightarrow \cos (x+2x)=\cos x\cos 2x-\sin x\sin 2x

Using identities 2 and 3:

\Rightarrow \cos x(\cos ^2x-\sin^2 x)-\sin x(2\sin x\cos x)\\\\\Rightarrow \cos^3x-\sin^2x\cos x-2\sin^2 x\cos x\\\\\Rightarrow \cos^3x-3\sin^2x\cos x

As, LHS = RHS

Hence proved

4 0
3 years ago
Kelly needs to order lunch for 6 people at a business meeting. Her menu choices are chicken salad for a cost of $5 per person an
Sophie [7]
4*6 = 24. (4 dollars to spare)

(5*2) + (4*4) = 26 (2 dollars to spare)
     ^          ^
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6 0
3 years ago
Which is bigger 3/4 or 1/4?
kirza4 [7]

3/4 is bigger.. 1/4=.25 and 3/4 = .75. .75 is closer to 1 whole than .25
6 0
3 years ago
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I think it's answer choice a

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