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I'll post around the given time. It could be with Gauss/gauss jordan elimination, matrices, inverses, word problems, etc

23 / 100  = x / 3     cross-multiply

69  = 100x      divide by 100 on both sides

69/100  = x

So

23 /100  =

 [69//100] / 3

What question ???

We can show, using trigonometry, that any point  (x, y) on a circle of radius R can be expressed as

(Rcosθ, Rsinθ)   where  θ is just some angle

So

x^2  + y^2 =  R^2cos^2θ + R^2sin^2θ  = R^2(cos^2θ  + sin^2θ)

But..... (cos^2θ  + sin^2θ)  = 1  ......so we have

x ^2 + y^2   = R^2

And if we let R = √41, then R^2  = 41   and we have

x^2 + y^2  = 41

And there you go......!!!

_nC_r calculates the number of combinations of sub-groups of size 'r' taken from an initial group of size 'n'.

For instance, if there is a group of 20 persons and 4 are chosen to represent that group, there will be ₂₀C₄ possible groups. 

When using combinations, order is not important -- there will be a group of 4 persons but the group of {Tom, Betty, Mary, Carl} is the same group as {Betty, Carl, Mary, Tom}.

It is calculated with this formula:  n! / ( r! · (n - r)! ).

It already IS a mixed number.....

If  f ' (x) = 24x^2 + 6sec(x)tan(x), then

f(x) = 8x^3 + 6sec(x) + C

And 

f(0)= 3   ....so

f(0) = 8(0)^3 + 6sec(0) + C  = 3

6 + C =  3

Then C = -3

So

f(pi)  =

8(pi)^3 + 6sec(pi) - 3 =

8(pi)^3 - 6 - 3

8(pi)^3 - 9  =  about 245.05

C = 2 * pi * r

So

C = 2 * pi * 4 kilometers

C = 8 pi  kilometers  = about 25.13 kilometers

? X 5 ÷20=15   write this as

(? X 5) ÷20=15      multiply both sides by 20

? X 5 = 300        divide both sides by 5

? = 60

30 minutes later, they would be located at (4,- 4)

To see this......note that they would have rotated (2 x 90) degrees = 180 degrees in 30 minutes

And (-4, 4) is located on the line  y = -x

And since a line is a straight angle measuring 180 degrees, then (4, -4) is also on this line, rotated 180 degrees from (-4, 4)

An Asymptote is where the graph-data never touches the x or y axis but comes very close to it, to the point where it does look like it however it never does touch. Asympototes typically have an L-like shaped-graph, where there is a curve.

Nothing......at least in a real number sense......

To see this  let   x be the first number and 8- x the second number...so we have

x (8 - x) = 33      simplify

-x^2 + 8x = 33

-x^2 + 8x - 33 = 0    multiply through by -1

x^2 - 8x + 33 = 0     using the onsite calculator, we have

$${{\mathtt{x}}}^{{\mathtt{2}}}{\mathtt{\,-\,}}{\mathtt{8}}{\mathtt{\,\times\,}}{\mathtt{x}}{\mathtt{\,\small\textbf+\,}}{\mathtt{33}} = {\mathtt{0}} \Rightarrow \left\{ \begin{array}{l}{\mathtt{x}} = {\mathtt{4}}{\mathtt{\,-\,}}{\sqrt{{\mathtt{17}}}}{\mathtt{\,\times\,}}{i}\\
{\mathtt{x}} = {\sqrt{{\mathtt{17}}}}{\mathtt{\,\times\,}}{i}{\mathtt{\,\small\textbf+\,}}{\mathtt{4}}\\
\end{array} \right\} \Rightarrow \left\{ \begin{array}{l}{\mathtt{x}} = {\mathtt{4}}{\mathtt{\,-\,}}{\mathtt{4.123\: \!105\: \!625\: \!617\: \!660\: \!5}}{i}\\
{\mathtt{x}} = {\mathtt{4}}{\mathtt{\,\small\textbf+\,}}{\mathtt{4.123\: \!105\: \!625\: \!617\: \!660\: \!5}}{i}\\
\end{array} \right\}$$

Notice that we have solutions.....just not "real" ones.....

Pi is irrational......therefore, there are no repeating patterns to its digits......thus, it has an infinite number of them.......!!!!

Ann is 12 because twenty-four divided by two is twelve!😛

The volume of a square pyramid is given by

V =(1/3)* pi * s^2* h         where s is the side length and h is the height......so we have

1024 = (1/3) (3.14) (s^2) (12)   simplify

1024 = 12.566 *  s^2         divide both sides by 12.566

1024 / 12.566  = s^2         take the positive root of both sides

s = 9.03 inches

it is -2 :0

it is -2 :0

Type 

log(7, 14)        [ where 7 is the antilog and 14 is the base  ]

 7(2-m)-11=-4        add 11 to both sides

7(2 - m)   = 7         divide both sides by 7

2 - m =   1              add m to both sides and subtract 1 from both sides

1 = m 

Check

7(2 - 1) - 11  = -4

7(1) - 11 = -4

7 - 11  = -4

- 4 = -4   .....which is true

Actully I don't think that is correct. I'm sorry to tell you that but it only because I messed up it should be a negitive 4

if solving for m..

first try to get the () alone, and everything else to the other side.

add 11 to each side

7(2-m)=15

then divide by 7

(2-m)=15/7

subtract 2

-m=15/7-14/7

-m=1/7

then multiply each side by -1 to get m to be positive

m=-1/7

:) hope that helped

if you are solving for x:

10x+15=0

get x by itself

10x=-15

divide by 10

x= -15/10

simplify:

x=-3/2

The answer is 2/10.

7/10-1/2 is the same thing as 7/10-5/10

Subtract the numerators and leave the common denominator of 10

hate to brake it to you but math will follow u all your life. just deal with it.