All Answers 352927 Answers

Hey, Lets be friiends now

For example: 125-247=? To do this you must end up with a negitive number as we can see we already don't have enough to take away 247 so here's what to do.

Let's start with our last number's, 5-7= -2

2-4=-2

1-2= -1

Now we can put our numbers in order, -122 If you noticed all of the answers were negitive so that means your number will be a negitive.

The answer is 19 unless you are talking about a Vine because then it would be 21 :D

Or if you use the input box type in 

nCr(10,3)

Thanks Chris :)

9+10 equals 19.

x^2-12x+20=0         let's factor this

(x -10) (x -2) = 0     and setting each factor to 0, we have the solutions that x = 10 and x = 2

Not that Melody needs anyone to defend her, but she's a person of many fine qualities.....and even if "answering questions" were all she did, that would be enough.....but......she also looks after the forum in many hidden ways we never see.....we are very lucky to have Melody here  (even if she is a little "barky" at times)...LOL!!!

Well if you know your basic 5 times tables you should know 5x12 is 60, so if you do the question as a positive first you might have an easier time, but I believe it should be -60.

(-a^0 * a^3)^5

Gotta' be a little careful, here ....  a^0 = 1  but that "-" in front of it makes it negative !!!  ...so we have

(-1 * a^3)^5      and by a property of exponents, we have

(-1)^5 * (a^3)^5  =

-1 * a^15 =

-a^15

Hit the nCr button on the lower left and type in 10, 3....just like that...!!!

x² + y²  =  26

x - y   =  6

Solve the second equation for x:  x - y  =  6   --->   x  =  y + 6

Replace this value into the first equation:  x² + y²  =  26   --->   (y + 6)² + y²  =  26

Multiply out:  y² + 12y + 36 + y²  =  26

Simplify:       2y² + 12y + 36  =  26

Get all terms to one side:  2y² + 12y + 10  =  0

Divide by 2:                              y² + 6y + 5  =  0

Factor:                                 (y + 5)(y + 1)  =  0

Solve:                       y  =  -5     or     y  -1

Place these values into the linear equation:  x  =  -5 + 6   --->   x  =  1   --->   (1, -5)

                                                           x  =  -1 + 6   --->   x  =  5   --->   (5, -1)

(If you replace back into the quadratic equation, you will get extraneous answers.)

Ah....thank you for that correction, Anonymous...that's what I get for being in a hurry...!!!

Let's do this...using x - y = 6   ..... we can just rearrange it and  say that y = x - 6

Now...in  x^2 + y^2 = 26, let's substitute what we just got for y...so this gives us

x^2 + (x -6)^2  = 26  simplify

x^2 + x^2 - 12x + 36 = 26

2x^2 - 12x + 10 = 0    divide through by 2

x^2 - 6x + 5 = 0     factor

(x -5 ) ( x -1)  = 0    so setting each factor to 0 , we find that x = 5  or x =1

And using y = x -6    when x =5 , y = -1  and when x = 1, y = -5

So..our solutions are (5, -1) and (1, -5)

press second, then cos

no. the answer is 174 cuz you could just get 24 and multiply it by 7 and one-fourth

Unless you're asking to factor this...then it becomes.... 30(3x + 4)

1:24 means  that the "real" car is 24 times as long as the model

So

24 x 7.5 =

24 x ( 7 + 1/2) =

168 + 12 =

180 in =

15 ft

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Edit ....24 (7 + 1/4) = 168 + 6  = 174 in = 14 ft 6 in = 14.5 ft

Thanks to Anon, again, for spotting my error...

17 is a prime number because you don't have any multiples that have the product of 17 other then 17 times one. Hope it helped.

17 is a prime number!!!

Hi Jeff. Do you have any question that I can help you with?

You can solve any algebraic eqution using this easy method. First you should add 7 in this case because your trying to isolate x. Then divide the sum by 7 and you will find what is x. Try it and figure out the answer. I hope this helped.

Oh - it is really good for private messages because you cannot upload a file there :)

I snipped it straight into Gyazo.  It is quicker that way.  

Have you used Gyazo?  It is free and it works the same as a snip only instead of saving it onto your computer is  justs gets immediately uploaded. :)