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21!!!!!!!!!!!!!!!!!!!!!!!! WEZ 9 + 10 21!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

$${\mathtt{9}}{\mathtt{\,\small\textbf+\,}}{\mathtt{10}} = {\mathtt{19}}$$

If something is 13% off, it is only worth 87% (.87) of its original cost.....can you figure out the new cost based on this??

$${\mathtt{5}}{\mathtt{\,\small\textbf+\,}}{\mathtt{5}} = {\mathtt{10}}$$

$${\mathtt{79}}{\mathtt{\,\times\,}}{\mathtt{8}} = {\mathtt{632}}$$

So we have

32 = x^2 - 2^2

32 = X^2 - 4   add 4 to both sides

36 = x^2        taking both roots, we have

±√36 = x

± 6  = x

Can you provide to us a specific question / example ???

it would equal 31.5 because you would times 9 by 21 then divide by 6

9*21=189

189/6=31.5

Do you mean - break it down to its prime factors?

360

=36*10

=4*9*2*5

=2*2*2*3*3*5

=$$2^3 \times 3^2 \times5$$

Note that each pound costs  $(9/6)  = $1.50

Can you take it from there???

Nice answer Tetration  

I'm interpreting this as

[5+2/3] + [3+2/3] + -[2+1/2] =

17/3 + 11/3  - 5/2  =

28/3  - 5/2 =

[56 - 15] / 6 =

[41 / 6 ] =

6 + 5/6

I think that you mean  [2nd]

What is 6/3-3(2)

( 6/3)-(3*2) = 2- 6 = -4

Very pretty  

I you treat her with respect she will treat you with respect in return.

This is how people are.

Algebra is essential for solving many problems.  Without it you would not be using your computer or talking to people on the other side of the world.  Your whole world would be different.

u=vw+z, for v

At the moment u is the subject because u is out the front by itself.

I think that you are being asked to make v the subject.

When solving, or rearranging equations you basically do PEDMAS in REVERSE

so 

1) subtract z from both sides

2) Divide both sides by w

Now swap sides and V will be out the front by itself.   

F(x)  =  -4x² + 16 x - 8

The x-value of the vertex can be found by using the formula:  -b/(2a).

For this problem,  a = -4,  b = 16, and  c = -8.

x-value  =  -b/(2a)  =  -16/(2·-4)  =  -16/-8  =  2

If  x = 2, F(2)  =  -4(2)² + 16(2) - 8  =  8

So, the vertex is  (2, 8).

The equation of the line of symmetry is the equation of the vertical line that passes through the vertex. This equation is:  x  =  2.

$${\frac{{\mathtt{2}}}{{\mathtt{4}}}} = {\frac{{\mathtt{1}}}{{\mathtt{2}}}} = {\frac{{\mathtt{5}}}{{\mathtt{10}}}} = {\mathtt{0.5}}$$

To find the size of the angle when you know the cos, use cos^-1(0.324).

On hand-held calculators use (2nd) (cos) , enter 0.324 to get the answer:  71.1°.

On this calculator, use (2nd) (acos) and then enter the value.

"acos" means "arc cos", which is the inverse cosine.

Similarly, find sin^-1(0.123) and tan^-1(0.783), using (2nd) (asin) and (2nd) (atan).

2y²  =  4x³ + 2

When y = 1:                                                        When y = -1:

2(1)²  =  4x³ + 2                                                 2(-1)²  =  4x³ + 2

2  =  4x³ + 2                                                              2  =  4x³ + 2

0  =  4x³                                                                    0  =  4x³

0  =  x³                                                                      0  =  x³

--->   x  =  0                                                              --->   x  =  0

7.8333333333333333...

Aint it tho

19 or 21 is the answer