All Answers 358090 Answers

  okay, so heres an example of one..

Graph y=5^-1x

I need to remember that the "negative" exponent reverses the location (along the x-axis) in which the power on 5 is negative. When the x-values are negative (that is, when I'm on the left-hand side of the graph), the value of –x will be positive, so the graph will grow quickly on the left-hand side. On the other hand, when the x-values are positive (that is, on the right-hand side of the graph), the value of –x will be negative, so the graph will stay very close to the x-axis.

Go too Pinterest...

Do you have like, a uhh, Certain equation at all for this??

Good MORNING

Girl the way you're movin'
Got me in a trance, DJ turn me up
Ladies dis yo jam (c'mon)
 

Just Jamming to some music

Well, What answers, First of all.

Very, Very sleepy/bored:)

I do, how is ur day going guest?

Oh, so that's what they were asking... The e's threw me off:)

Sleepy! You?

First, do 25 * 8, Which will be 200, then simply add 8.

So your answer will be 208.

Good Morning Haley? How r u?

what is the square root of 94

We actually cannot simplify it.

Factor 94 into its prime factors
           94 = 2 • 47 

To simplify a square root, we extract factors which are squares, i.e., factors that are raised to an even exponent.

In our case however, all the factors are only raised to the first power and this means that the square root can not be simplified

The simplified SQRT looks like this: 
         sqrt (94)  

But, if you wish for it to be a decimal, then it'll be 9.69535971483, But if you would like me to round it, It'll be..

8.

joey earns $7.65 an hour at his part time job.he received a 20% raise.how much will joey now earn for working 40 hours

\(\begin{array}{rcl} \frac{ $7.65 }{ \text{hour} } \cdot ( 100\%+20 \% ) \cdot 40\ \text{hours} &=& $7.65 \cdot 1.2 \cdot 40 \\ &=& $367.2 \end{array}\)

Joey will now earn for working 40 hours $367.2

oh okay, sorry for my silly question :D. Thanks, everyone!! <33

This might be a silly question, but how did you know that that would be the answer?

 \(\begin{array}{rcrcr} \color{blue}3x^2 &-& x^2 &=& \color{red} 2x^2 \\ \color{blue}7x &-& (- 2x) &=& \color{red}9x\\ \color{blue}0 &-& 6 &=& \color{red}-6 \end{array}\)

Good morning Hayley :)

I suppose it is morning here too since it is 12:25am :))

What Polynomial must be added to X^2-2x+6 so that the sum is 3x^2+7x?

well

\(x^2 +   2x^2 = 3x^2\\ -2x+ 9x=7x\\ 6+ -6 = 0\\ so\\ x^2-2x+6\quad +\quad 2x^2+9x-6 = 3x^2+7x\)

So the polynomial that you seek is

\(2x^2+9x-6\)

This might be a silly question, but how did you know that that would be the answer?

What Polynomial must be added to X^2-2x+6 so that the sum is 3x^2+7x?

\(\begin{array}{rcrcrcr} && x^2 &-& 2x &+& 6 \\ &\color{red}+& \color{red} 2x^2 &\color{red}+& \color{red}9x &\color{red}-& \color{red}6 \\ \hline &=& \color{blue}3x^2 &\color{blue}+& \color{blue}7x &\color{blue}+& \color{blue}0 \\ \end{array}\)

The average score of the last 3 quizzes of Sofia was 83. The overall average of her 6 quizzes was 86. What was her average score for the first 3 quizzes?

\(\begin{array}{rcl} \frac{s_1+s_2+s_3}{3} &=& ? \\ \hline \frac{s_4+s_5+s_6}{3} &=& 83 \qquad | \qquad \cdot \frac12\\\\ \frac{s_4+s_5+s_6}{6} &=& \frac{83}{2}\\ \hline \frac{s_1+s_2+s_3+s_4+s_5+s_6}{6} &=& 86 \\ \frac{s_1+s_2+s_3}{6} + \frac{s_4+s_5+s_6}{6} &=& 86 \\ \frac{s_1+s_2+s_3}{6} + \frac{83}{2} &=& 86 \qquad | \qquad \cdot 2 \\ \frac{s_1+s_2+s_3}{3} + 83 &=& 86 \cdot 2 \\ \frac{s_1+s_2+s_3}{3} + 83 &=& 172\\ \frac{s_1+s_2+s_3}{3} &=& 172 - 83 \\ \mathbf{\frac{s_1+s_2+s_3}{3}} & \mathbf{=} & \mathbf{89} \\ \end{array}\)

The average score for the first 3 quizzes was 89

Aditya, if there is to be the slightest hope of more help,

you need to include the address of you post :/

Wed 13/1/15

1) Seven sisters BUT how many legs?  Can you count them?

    http://web2.0calc.com/questions/seven-sisters

2)  Great puzzle - an old one but a good one.  Thanks CPhill Heureka and Gibsonj338.

     http://web2.0calc.com/questions/mathematical-challenge

3)  Geometry questions - these are always good for your brain and CPhill is good at them.  Thanks CPhill.

     http://web2.0calc.com/questions/triangle_4

4)  Does       \(\sqrt{x-y}=\sqrt{x}-\sqrt{y}\quad ?\)

                                                      Thanks xvxvxv, CPhill and gibsonj338

     http://web2.0calc.com/questions/help_87840

5)  Sum of squares   Really interesting method and great Latex too!   Thanks Heureka

      http://web2.0calc.com/questions/infinite-sums

6)  Repeat probablilty question from yesterday.      Melody and CPhill.

     http://web2.0calc.com/questions/so-hard-plz-help-me

@@ What is Happening?  [Wrap4]   Tues 12/1/16   Sydney,  Australia Time 11:44 pm   ♪ ♫

Hi all,

Well the year has definitely started on the forum.  Australian children do not go back until the beginnning of February!  :)

There have been some great questions and these have been answered by Cphill, Alan, Heureka, Omi67, Dragonlance, Coldplay, xvxvxv, KatieLeigh, HeadBuster, Solveit and InstagramModel.  Thank you everyone, you are all treasures  

Technical Issues:

Mr Massow has repaired our image posting facility - this is great - it is so much quicker than it has been for the last few months.

Here are the instructions:    

It is 2

Sorry Guest, Sorry Melody, I am not very polite... I will try to stay in school guest, but I will prob be kicked out... It's one of the reasons I'm homeschooled:)