All Answers 358087 Answers

1/2 x (15+19) x 14= 1/2 x 34 x 14= 17 x 14= 238

Final Answer: 238

\(\frac{-4}{{x}^{-6}}\)

\(-\frac{4}{{x}^{-6}}\)

\(-{4x}^{6}\)

how do I multiply exponents? (x-2y-4)-3(y4y3) the numbers are exponents

This is how you could have written it      (x^-2y^-4)^-3(y^4y^3)

\( (x^{-2}y^{-4})^{-3}\times (y^4y^3)\\ =(x^{-2*-3}y^{-4*-3})\times (y^{4+3})\\ = (x^{6}y^{12})\times (y^{7})\\ = x^{6}y^{12}y^{7}\\ = x^{6}y^{12+7}\\ = x^{6}y^{19}\\ \)

The answer to your question is dependent upon what it is being compared to. On its own, I suppose it is 100 Percent of itself.

19/6 x 3/1= 3x19/6= 57/6= 9 1/2= 9.5

Final Answer: 9 1/2 OR 9.5

Could be a Wi-Fi problem. You have to tell me what is exactly going on. 

11X10X9X8X7X6=332,640. Answer: 332,640 different ways.

Explanation: 11 people can obviously fill the first role, so that's 11 possibilities for the first position. After one of the eleven is selected, 10 are left who could possibly fill the next position on the committee, so there are ten possibilities for that position. Continue, and then multiply.

1-(-.21)= 1+.21=1.21

The absolute value of 1.21 is 1.21.

Final answer: The absolute value is 1.21.

3x^2+2x+1 

This cannot be factorised.   The factors would be complex (imaginary) numbers and I doubt you have dealt with those yet.

I know there are no real factorization because    b^2-4ac = 4-12=-8  And in the quadratic formula this would be under  the square root and you cannot find the square root of a negative number. :(

the second one is just 4 times the first one

12x^2+8x+4 = 4(3x^2+2x+1 )

that is all you can do with it :)

40(x-2)=200

40x-80=200

     +80  +80

40x=280

  /40   /40

x=7

l 2x + 6 l   - 4  = -20   add 4 to both sides

l 2x + 6 l   = -16

Note that this has no solution because absolute value is always positive (or 0).......thus, the left side [ a positive, or zero] cannot equal the right side [ a negative]

Comparing the length of the model with the actual length, the scale must be :   2 ft   = 800 meters

So.....the actual  width can be foung thusly :

800/2  = width/ 1.4     multiply both sides by 1.4

[800] * [1.4] / [2]  = width = 560 meters

And the area is length * width.......so the area  = 

800m * 560m =  448,000 square meters

And the perimeter  =

2 [width + length ]  = 

2 [ 560 + 800]   =  2720 meters

D is the answer

10. GOSH ARE U DUMB

je parle francais

Let x be the height  .....  then the base = 2x + 2

So we have

Area = (1/2) (base) (height)

20  = (1/2)(2x + 2)(x)    simplify

20 = x (x + 1)

20 = x^2 + x            subtract 20 from both sides

x^2 + x - 20   = 0        factor

(x + 5) ( x - 4)  = 0

Only the second factor makes sense

x - 4 =  0      add 4 to both sides

x = 4 ft      and this is the height

And the base =   2(4) + 2   = 10 ft

This is easily solved....just set each factor  =  0   .......so we have

x = 0                                 x + 6  = 0                                x + 9 = 0

                                 subtract 6 from both sides         subtract 9 from both sides

x = 0                                x = - 6                                    x = - 9

And those are the three solutions

Assuming a square pyramid, the base is easy....it's just  5^2   = 25 square units

We need to find the slant height.......this is given by :

√ [5^2 + 2.5^2]  = about  5.6 units

So.....the area of the sides  =

4 * (1/2) * (side length) * (slant height)

4 * (1/2)(5)(5.6)  =  56 square units

So....the total surface area  ≈ [ 25 + 56] square units ≈   81 square units

-15