All Answers 358180 Answers

0

Never mind. Figured it out.

GuestJan 9, 2013

Jan 8, 2013

+3146

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[input]plot( abs( -2x-1 ), 7, x=-4..4 )[/input]

solve: -2x-1 = 7 and -(-2x-1) = 7

-2x-1 = 7
-2x-1+1 = 7+1
-2x = 8
-2x/-2 = 8/-2
x = -4

-(-2x-1) = 7
2x+1 = 7
2x+1-1 = 7-1
2x = 6
x = 6/2
x = 3

adminJan 8, 2013

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cuberoot (-162) = - cuberoot (27 * 6) = - cuberoot (3^3 * 6) = -3 * cuberoot(6)

cuberoot (16xy) = cuberoot (8*2xy) = cuberoot (2^3 *2xy) = 2 * cuberoot (2xy)

GuestJan 8, 2013

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its 20, 4x4 is 16, + another 4x4 is 32, +4 is 36, then takeaway 4x4 (which we already know equals 16) is 20

GuestJan 8, 2013

Jan 7, 2013

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GuestJan 7, 2013

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choose equation solver and write -350000+160000*e^(0.015*x)) and solve...

GuestJan 7, 2013

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GuestJan 7, 2013

Jan 6, 2013

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not not not not not not

GuestJan 6, 2013

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( a + b )2 = a2 + 2ab + b2

( a - b )2 = a2 - 2ab + b2

( a + b ) ( a - b ) = a2 - b2

GuestJan 6, 2013

Jan 5, 2013

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| 3 7 0 | |x| | 12 |
| 2 -5 0 | |y| = | -7 |
| 5 0 2 | |z| | 3 |

GuestJan 5, 2013

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sorry the actual question is [sqrt(1-cot^2x)*sqrt(sec^2x-1)]/cos x= tan^2x

GuestJan 5, 2013

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show that [sqrt(1-cot^2x)*sqrt(sec^2x-1)]/cos x= tan 2x

GuestJan 5, 2013

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you solve by:
first add 4y to both sides
then subtract 12 from both sides
next you divide all by 4
answer should be y=3/4x + 3
hope this helps

GuestJan 5, 2013

+3146

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[input]3.108*((6.62*10^-34)/(1.938*10^-18))[/input]

[input]3.108*((6.62e-34)/(1.938e-18))[/input]

[input]0.00000000000000106165944272445820433[/input]

adminJan 5, 2013

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Je ne parle pas français, mais si vous lisez l'anglais il ya un lien vers «Aide» sur la page calculatrice qui peut vous guider. Bonne chance.

GuestJan 5, 2013

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if the problem is

[sqrt(1 - {cot(x) * cot(x)}) * sqrt(1 - {tan(x) * tan(x)})] / cos(x) = tan(2x)

and the angles are real numbers,

then it is NOT an identity. in fact, it is NEVER true, which would make it an ANTI-IDENTITY, i suppose.

nice try though

(for those interested - plug in a few angles to see what happens)

GuestJan 5, 2013

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yes, there is a difference.

because |4 - 7| = 3 and (4 - 7) = -3, the solutions (of the two problems) will differ.

|4 - 7| - |8 - 2| = 3 - 6 = -3, while (4 - 7) - (8 - 2) = -3 - 6 = -9.

(notice that |8 - 2| = (8 - 2), since 8 - 2 is positive.)

GuestJan 5, 2013

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Hello:
3y-4-5y=2y+4 please help!!!

-2y-4=2y+4
-4y=8
y=-2

GuestJan 5, 2013

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when you enter
6/(2(2+1)) in any calculator than the answer will be 1.
and
6/2(2+1) in any calculator than the answer will be 9.
It is not the stupid question by any way at all.

GuestJan 5, 2013

Jan 4, 2013

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GuestJan 4, 2013

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GuestJan 4, 2013

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GuestJan 4, 2013

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GuestJan 4, 2013

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GuestJan 4, 2013

Jan 3, 2013

+3146

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25*2-54:X=56
":" is the wrong operation in this context, use "/" instead:
[input]25*2-54/X=56[/input]

adminJan 3, 2013

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