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@Melody:/   The ratio between A and B is 3:8, and between B and C is 5:2 ;

                   But I want the ratio between B and C to be 8:x

                   Let's find an x :

                   5/2 = 2.5         8/2.5 = 3.2     =>   x = 3.2

                   Now I have these 2 ratios:   A:B = 3:8,  and  B:C = 8:3.2

                   Out of these 2 ratios, I can create a 'triple' ratio:     A : B : C = 3 : 8 : 3.2

(Note that the ratios  5:2  and  8:3.2 are equal.)

OK. You can just click on post answer at the bottom of the post it don't have to be an answer it can be any thing.

If you want you can make an account. It is real easy. Don't forget you password. The best way is to write it down  then type it in. Then put the paper you write it on in a safe place.

First press the 2nd button, then acos will appear - this is the same as cos^-1.

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OK to figure out how long it will take for the population to double take the Log(2)/Log(1.009) The 2 mean to double.

$${\frac{{log}_{10}\left({\mathtt{2}}\right)}{{log}_{10}\left({\mathtt{1.009}}\right)}} = {\mathtt{77.362\: \!409\: \!451\: \!566\: \!917\: \!5}}$$

The rate is per year so it will take 77.4 years to double the population. 

Hi Tiffanie, I can help. You should look at my second post on the other one because the rate number you post might not have been the right one. I not expect you to answer because most Anons never reply.

I will work on this one now.

OK I look here to find the population

https://en.wikipedia.org/wiki/List_of_U.S._states_and_territories_by_population

I compare the 2000 population with the 2010 population for a 10 year average and 2015 with 2000 as an average for 15 years. That give about 0.72% which is 0.0072. The way they do the math it might be higher like 0.009. That is 0.9%

SO this means maybe you meant the number to be 0.9% not 0.09%. 0.9% is 0.009.

If that is true then the answer is

$${\mathtt{4\,413\,457}}{\mathtt{\,\times\,}}{\left({\mathtt{1.009}}\right)}^{{\mathtt{10}}} = {\mathtt{4\,827\,147.417\: \!057\: \!420\: \!231\: \!152\: \!8}}$$

I dont know for sure if it is right but it work for the listed populations so this is probably the right answer, but one of the mods should check though. 

OK What you do here is change the percent to a decimal then add 1. This is 1.0009. Then raise that to the power of 10 like this (1.0009)¹⁰ then multiply by the population 4,413,457.

(1.0009)¹⁰ * 4,413,457.

$${\mathtt{4\,413\,457}}{\mathtt{\,\times\,}}{\left({\mathtt{1.000\: \!9}}\right)}^{{\mathtt{10}}} = {\mathtt{4\,453\,339.370\: \!205\: \!616\: \!109\: \!484\: \!1}}$$

Then round to a whole number 4,453,339.

I look it up your state is Kentucky. 

You can do it like this

4*3 + 4⁰ that = 12 + 1 = 13

if i am given two sides of a triangle with the angle in between how do i find the third angle

1. Example: Given b,c and   $$\angle CAB$$  (A) between:

$$\tan{(B)} = \dfrac{ b\cdot \sin{(A)} }{ c-b\cdot \cos{(A)}}\qquad
\tan{(C)} = \dfrac{ c\cdot \sin{(A)} }{ b-c\cdot \cos{(A)}}$$

cycle:

2. Example: Given c,a and   $$\angle ABC$$  (B) between:

$$\tan{(C)} = \dfrac{ c\cdot \sin{(B)} }{ a-c\cdot \cos{(B)}}\qquad
\tan{(A)} = \dfrac{ a\cdot \sin{(B)} }{ c-a\cdot \cos{(B)}}$$

cycle:

3. Example: Given a,b and   $$\angle BCA$$  (C) between:

$$\tan{(A)} = \dfrac{ a\cdot \sin{(C)} }{ b-a\cdot \cos{(C)}}\qquad
\tan{(B)} = \dfrac{ b\cdot \sin{(C)} }{ a-b\cdot \cos{(C)}}$$

Sorry, Anonymous.....but Q can't possibly be "26"

This would imply that :

26 + l 16.4 l  = 9.6      which definitely isn't true......adding an absolute value to 26 has to result, at the very least, in a value of 26....and this cannot equal 9.6  !!!!!

7^3-4•3+8

Sorry, Anonymous, but the first operation is to exponentiate.....so 7^3  = 343

Then, we would multiply 4*3  =12    and we have....

343 - 12 + 8     =   339

16.4 can be +ve or -ve

if +ve

Q+16.4= 9.6

Q= 9.6-16.4

Q= -6.8

if -ve

Q-16.4= 9.6

Q= 9.6+ 16.4

Q= 26

So the solution set is Q = {26, -6.8}

I assume you want the angle of elevation at the bottom of the hill....We can use the sine inverse to find this....we have........

sine^-1 (550 /1750) = about 18.3°  = 18°   (to the nearest degree)

Q + |16.4| = 9.6     notice that the absolute value of a positive number is just the number itself.....so we have

Q + 16.4 = 9.6    subtract 16.4 from both sides

Q =  - 6.8

30,60,90,120,150

Same as multiples if 3 but add a zero to tge right because 6*5= 3*2*2= 3*10

The absolute value of a number is positive.

12=w-(7)

12=w-7

w=19

H = 6/7

2+h+4 = 2* h* 4

Divide both sides by h

6/h +1 = 8

6/h = 7

6 = 7h

6= 7* (6/7)

So, h = 6/7

This is known as the "Pigeonhole" principle.....Melody is correct......if we pull out all different ones on the first three tries, we must have a matching pair after the fourth  one is selected.....!!!!

Let Noah's rate = R .....  then Grady's rate is  R + .60R 

And Rate * Time = Distance    ...so....

R(2) + 12 =  [R + .60R](2)   ....   simplify

2R  + 12  = 2R + 1.2R       subtract 2R from each side

12 = !.2R      divide both sides by 1.2

R = 10 mph  ......and this is Noah's rate

Note that Grady's rate = 10 + .60(10)   = 16 mph

And, as Anonymous has pointed out, Grady rides 32 miles and Noah rides 20 miles

(x/2 - 3/x) ^2 = 5^2

X^2/4 - 3 + 9/x^2 = 25

X^2/4 + 9/x^2 = 25 + 3 = 28

Multiplication

well you could go to person and tap them on the shoulder and say hello excuse me. Nice to meet you im so and so and then carry on with a conversation. Hoped this helped.

x/2-3/x=5

Multiply 2x to both sides

x^2-6=10x

Subtract 10x from both sides

x^2-10x-6=0

Add 6 to both sides

x^2-10x=6

→x(x-10)=6

x=$${\mathtt{5}}{\mathtt{\,\small\textbf+\,}}{\sqrt{{\mathtt{31}}}}$$ or $${\mathtt{5}}{\mathtt{\,-\,}}{\sqrt{{\mathtt{31}}}}$$

So, x^2/4+9/x^2=28

on questoin 2 would you not distribute the 4(x+2) and get 4x+8

(c-1)*(c-2)=c^2+(-1+-2)c+(-1*-2)

=c^2-3c+2