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Oh yes, the nine's remainder rule! So the answer is five right?

Because: $${\mathtt{3}}{\mathtt{\,\small\textbf+\,}}{\mathtt{7}}{\mathtt{\,\small\textbf+\,}}{\mathtt{8}}{\mathtt{\,\small\textbf+\,}}{\mathtt{4}} = {\mathtt{22}}$$ and 27 is the next number divisible by nine, so five is the difference.

A number is divisible by 9 if the sum of its digits is divisible by 9.

Can you find a digit Q such that  3 + Q + 7 + 8 + 4  is a multiple of 9? 

Theorem of the medians of a triangle:  they are concurrent at a point that is 2/3rds of the distance from a vertex to the middle of the opposite side.

Can you take it from here?

What is the value of a share of preferred stock that pays a $4.50 dividend, assume k is 10%.

Let x = number of students who got 100

Let y = number of students who got 90

Let z = number of students who got 80   --->   z = 20

Number of students:

      x + y + z = 48   --->   x + y = 28   (since z = 20)

Points:  100x + 90y + 80z  =  48(90)              (since the average for 48 students was 90 points each)

            100x + 90y + 80(20)  =  4320

            100x + 90y  =  2720

Putting these two equation together:  

      x    + y  =  28   --->     (multiply by 90)     --->     90x + 90z  =  2520

100x + 90y  =  2720   --->     (change signs)   --->    -100x - 90y  =  -2720

Adding down the columns:                                          -10x         =  -200

                                                                                          x   =  20

Since x + y  =  28   --->  y = 8

besides me

y = -.156(30) + 13.348 is our problem.

First we multiply -.156 * 30

$${\mathtt{\,-\,}}\left({\mathtt{0.156}}{\mathtt{\,\times\,}}{\mathtt{30}}\right) = {\mathtt{\,-\,}}{\frac{{\mathtt{117}}}{{\mathtt{25}}}} = -{\mathtt{4.68}}$$

Then we add 13.348 to that product and the sum is our answer.

A U.S. Government bond with a face amount of $10,000 with 8 years to maturity is yielding 3.5%. What is the current selling price?

Charlie Company is expected to grow at an annual rate of 6% indefinitely. The return on similar stocks is currently 11%. Charlie's board of directors declared a dividend of $1.85 yesterday. What should a share of Charlie Company sell for?

Questions 1 and 2 seem to be the same question. Using the method of successive subtractions, you can show that it can't be linear, quadratic, nor cubic. However, because of the missing value for x = 6, I can't take it past that. Perhaps someone else can.

Question 3: Place the data for year into L1 and the data for median age into L2, and check LinReg, QuadREg, CubicReg, and QuartReg, until you get one of the answers listed. (None are perfectly close, just match the possible answer to what your calculator gave you.

Question 4: Use your answer of Question 3 to solve this question.

Question 5 is like Question 3.

Question 6: Place the data for year into L1 and the data for percentage into L2, and check LinReg, QuadREg, CubicReg, and QuartReg, until you get the highest R-value. Choose that for the formula you will use to get the answer.

Hi Guys! Got any Feed back for this chat room?

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example:

$${{\mathtt{5}}}^{{\mathtt{2}}} = {\mathtt{5}}{\mathtt{\,\times\,}}{\mathtt{5}}$$...then you solve 5 • 5 = 25

LOL!!!....love the Elvis reference.......he used to play in Shreveport at the Louisiana Hayride a lot before he got really famous......there's a donut shop here (Soouthern Maid) that he used to frequent all the time.....his signed picture still hangs there to this day....!!!

Sadly....he has left the building.....

U 2  .....!!!

gooda job, CPhill!😊😜

log a-log ab  ....... by a property pf logs, we have

loga - logb  = log (a / b)   .....so.....

log a - log ab =  log (a / ab) = log (1 / b)  = log b^-1 = - log b

isn't it log(1/b)???

You're right; I misread the question. Oh well.

yes. thx for the explaination, mathematician!!!!

That is correct, but I would explain:

Basicly "9 times what equals 3" is 9x=3.

So we divide both sides by 9:

9x/9 = 3/9

Which simplifies to:

x = 1/3.

And 1/3 is our answer.

We NEED emily up in here lol jk.

We try our best, Anonymous......!!!!

Just testing how good this website was lol, pretty good after all ,thaanks ! (;

Thank you. I was going to explain it in a more complex way but then I thought about it for a moment and realized an easier way.