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An acre is an "area", in SQUARE units. In square feet =43,560 sq. feet. You can't compare "feet" to "square feet". If you wanted to know what 20 "square feet" were to an acre, then you could divide:

20/43,560 =1/2,178 of a "square foot".

Rewrite these as:

2n + m = 10.      (1)

n + 3m = 10.      (2).  

Rewrite (2) as:  n = 10 - 3m    (3)

Use (3) in (1)

2(10 - 3m) + m = 10

20 - 6m + m = 10

10 = 5m

m = 2

Put this into (3)

n = 10 - 3*2

n = 4

m and n are variables 

10 percent of 100 is 10. To find this answer. do the following:

0.1 (0.1 is ten percent in decimal form) * 100

Yo.

f(x)=x^2-px-6, and f(-2)=6 find the value p.

\(f(x)=x^2-px-6\\ f(-2)=(-2)^2-p*(-2)-6\\ (-2)^2-p*(-2)-6=6\\ 4+2p-6=6\\ 2p-2=6\\ 2p=8\\ p=4\)

      3=-3x+39   |+3x

3+3x=39          |-3

    3x=36          | : 3

      x=12

2x-6=x+1         |-x

  x-6=1            |+6

     x=7

   4x=2x+10     |-2x

   2x=10           | : 2

     x=5

x10^18 / 6.022x10^23 = 

\(\large x=\frac{10^{18}}{6.022\times 10^{23}}=\frac{1}{6.022\times 10^{23-18}}=\frac{1}{602200}\)

  !

10!/3!4!2!

\(\frac{10!}{3!4!2!}\\ =\frac{4!*5*6*7*8*9*10}{6*4!2!}\\ =\frac{5*7*8*9*10}{2!}\\ =5*7*4*9*10\)

5*7*4*9*10 = 12600

Hi Complex :))

1000$ divided by 3%

1000/(0.03) = $33333.33

what is the square root of 3 over 2

Can't be simplified :)

10

I think there is a problems with this question.

3 points is enough to define a parabola

I am assuming this is supposed to be a standard concave up parabola.

Now (-5,5) and (4,5) both have the same y value so the x half way between them should be the axis of symmetry.

\(x=\frac{-5+4}{2}=\frac{-1}{2}=-0.5\)

The axis of symmetry is x= -0.5

Since one root is at x=-1, the other root should be at x= 0

So the parabola is  

\(y=a(x-0)(x--1)\\ y=a(x)(x+1)\\ \text{Another point is (4,5) so sub that in to find }a\\ 5=a(4)(4+1)\\ 5=a(4)(5)\\ 5=20a\\ a=0.25 so\\ y=0.25(x^2+x)\\ \)

Here is the graph - you can see that this parabola cannot include the point (2,2)

Vertex.  

\(x=-0.5\\ y=0.25*(0.25-0.5)\\ y=0.25*-0.25\\ y=\frac{-1}{16}\\ \text{Vertex is } (\frac{-1}{2},\frac{-1}{16})\)

\(\)

  " its  "  instead  of   " it's " .......   !!!!!!

1.   The 'opposite' of a number is it's negative  ....so we have....

7N  =  −N + 56      add N to both sides

8N  = 56   divide both sides by 8

N  = 7

Proof

7(7)  = −7 + 56

49  = 49

(9)   ( 2 + 3i) (2 − 3i)  =   4  − 9i^2   = 4 − 9(−1)  =  4 − (−9)   =  2^2 + 3^2 =  13

A real number

The product of a complex number and its conjugate always produces this real number →

(a + bi) (a −bi)  = a^2 − (b^2 )(i^2)   = a^2 − ( b^2) ( −1)  = a^2  − ( −b^2)  = a^2 + b^2    !!!!!

Please put different questions on different posts.

I have no idea what the 'opposite' of a number is...

3. Simplify: y^-7x^3zx^-1y^7z^-4

\(y^{-7}x^{3}zx^{-1}y^7z^{-4}\\ =y^{-7}y^7x^{3}x^{-1}z^{-4}z^1\\ =y^{-7+7}x^{3+-1}z^{-4+1}\\ =y^{0}x^{2}z^{-3}\\ =1x^{2}z^{-3}\\ =x^{2}z^{-3}\\ =\dfrac{x^2}{z^3}\)

What is 6x+9y = 28,  x=6

6(6) + 9y  = 28

36 + 9y  = 28      subtract 36 from both sides

9y  =   −8             divide both sides by 9

y = − 8/9       when x = 6

5/7 = 0.714285714

So 6x+9y=28 when x=6, so we replace x with 6. And when two numbers are close to each other you have to multyply. 6*6+9y=28, 6*6= 36 ; 36+9y=28. But if you want to backtrack it, it will be hard...

LOL

Oh ok whatever you say Chris   

If I  read it correctly ....here's   6

$[5x]      for    0 ≤ x ≤ 10

$[50]      for    x > 10

Hey, Complex......welcome back....!!!

20...one possibility.......

  y = −(x − 4)²  + 1

23   ..... f(x) * g(x)  = degree 2  * degree 3  = degree 6

26  f(x + 3)  shifts the graph [ and roots] to the left by 3 units....so the "shifted" roots are −3, −2, −1