All Answers 356076 Answers

It depends which angle you mean but I think it is the angle between the vertical and the direction that the plane is sited at.

so

cos 49 = height/900

height = 900 cos 49 = 900*cos(49) = 590.4531260919

590 feet.

How do I use the distributive law to work out: 63*13+63*17 ?

63*13+63*17 

=63*(13+17)

=63* 30

=63*3*10

=189*10

=1890

I would help you but I do not understand the question.

You rolled it 28 times but where are your results for those 28 rolls.

What are thes numbers for

 1 2 2 7 3 9 4 4 5 6 6 0  ????

ALSO,

If you had been a member I would have given you this answer sooner.

Members get priority and it is easy and free to join :)

Hi Gibsonj338,   

I am sure that you already know the answer is 2 and 1.  I did it with simultaneous equations which is how you would usually do it too.

That is a=1 and b=2

a+b=3

a-b=-1

ab=2

a/b=1/2

Am I mising something here?

No

1 Kg = 1000 g

Hi, I will try to give you some insight into how to work this out easily.

what two numbers add to 13 but multiply to -30?

First what are the pairs of factors of 30    (for now I will ignore the minus sign)

1 and 30

2 and 15

3 and 10

4 no,

5 and 6

there is no number between 5 and 6 so that is the last pair!

Now they have to multiply to give -30.  This is a negative number so one will have to be negative and one will be positive.

They also have to add to be 13 which is positive so the biggest one will be positive.

So now our posibilities become

-1 and +30

-2 and +15

-3 and +10

-5 and +6

Now they have to add to be 13

-1 and +30 = 29

-2 and +15 = 13

-3 and +10 = 7

-5 and +6 =1

So the answer has to be -2 and 15       

If there had been no answer it means that the answer would have to be irrational or complex :)

sinx-x<0.1 how do I find x?

\(sin(x)-x<0.1\\ sin(x)<0.1+x\\ \)

I would graph

y=sin(x)

and 

y=0.1+x

The statement will be true when the sin(x) curve is under the line.

what is pi times ?^=1.5

1.5 / pi =0.47746482927568600730665129011754.................etc.

\(\frac{1}{2}\times1000\)

\(\frac{1}{2}\times\frac{1000}{1}\)

\(\frac{1000}{2}\)

\(500\)

\(x+y=13\)

\(x\times y = -30\)

Take the first equation and solve for y.

\(x+y=13\)

\(x+y-x=13-x\)

\(0+y=13-x\)

\(y=13-x\)

Take that equation you solved for y and sbtitute y in the second equation.

\(x\times(13-x)=-30\)

\(13x-x^2=-30\)

\(13x-x^2+30=-30+30\)

\(13x-x^2+30=0\)

\(-x^2+13x+30=0\)

\((-1)\times(-x^2+13x+30)=0\times(-1)\)

\(x^2-13x-30=0\)

\((x-15)(x+2)=0\)

\(x-15=0\)    \(x+2=0\)

\(x-15+15=0+15\)    \(x+2-2=0-2\)

\(x-0=15\)    \(x+0=-2\)

\(x=15\)    \(x=-2\)

Subsitute the two numbers in the two original equations to see if the two answers work.

\(15+(-2)=13\)    \(15\times(-2)=-30\)

\(15-2=13\)    \(15\times(-2)=-30\)

\(13=13\)    \(-30=-30\)

Both numbers checks out which means the two numbers that add up to 13 and multiply to -30 are 15 and -2.

Anyone?

63*13+63*17 ?

819 + 1,071 =1,890

Sin(49) =Height/900

0.75471=H / 900

H=679.24 feet-the height of the helicopter.

p2 = 9.81(z1 + p1/9.8 + v1²/2g - z2 - v2²/2g - Hf)

Thanks

a=15, b= -2, or

a=-2, b=15

\(sin(x)=-\frac{1}{\sqrt{2}}\)

\({sin}^{-1}(sin(x))={sin}^{-1}(-\frac{1}{\sqrt{2}})\)

\(x=-\frac{\pi}{4}\)

That is how you do it with a calculator.  To get to the answer without using a calculator, looking at the unit circle, what point on the unit circle between \(-\frac{\pi}{2}\) and \(\frac{\pi}{2}\) is the y value equal to \(-\frac{1}{\sqrt{2}}?\)  The point on the unit circle is actually a point that is easily memorized.

\(sin(x)<0.1\)

\({sin}^{-1}(sin(x))<{sin}^{-1}(0.1)\)

\(x<0.01001667421162...\)

Let May's age =M

Her father's age=M+32

M+32+9=2(M+9)

M+41 =2M+18

M=23 May's age now

23+32 =55 Her father's age now.

Expand the following:
(x-4)^3

(x-4)^3  =  sum_(k=0)^3 binomial(3, k) x^(3-k)×(-4)^k  =  binomial(3, 0) x^3 (-4)^0+binomial(3, 1) x^2 (-4)^1+binomial(3, 2) x^1 (-4)^2+binomial(3, 3) x^0 (-4)^3:
binomial(3, 0) x^3-4 binomial(3, 1) x^2+16 binomial(3, 2) x-64 binomial(3, 3)

binomial(3, 0) = 1, binomial(3, 1) = 3, binomial(3, 2) = 3 and binomial(3, 3) = 1:
x^3-3 4 x^2+3 (-4)^2 x+(-4)^3

(-4)^2 = 16:
x^3-4 3 x^2+16 3 x+(-4)^3

(-4)^3  =  (-1)^3×4^3  =  -4^3:
x^3-4 3 x^2+16 3 x+-4^3

4^3 = 4×4^2:
x^3-4 3 x^2+16 3 x-4×4^2

4^2 = 16:
x^3-4 3 x^2+16 3 x-16 4

4×16  =  64:
x^3-4 3 x^2+16 3 x-64

16×3  =  48:
x^3-4 3 x^2+48 x-64

-4×3  =  -12:
Answer: |  x^3+-12 x^2+48 x-64

C=2 times pi times the radius

so

C= 2 times pi times 4

   = 25.1327

You can just use ^ and your number you need after it to indicate you are using an exponent.

3x doesn't contian the viarable to solve for. You are going to move it to the right side of the equation by subtracting 3x from both side. 

It should look like this:  4y = -3x + 6

Then, mulriply each term by 1/4 and simplify.

Now looks like: 4y/4 = -3x/4 + 6/4

You will cancel your common factors.

You will have: y = -3/4 + 6/4

Reduce by cancelling the common factors.

Factor 2 out of 4

looks like: y = -3x/4 + 2•3/2•2

Cancel your common factors.

Now you have:  y = -3x/4 + 3/2

Use your slope intercept y=mx+b

m = -3/4 and b = 3/2

Your slope is -3/4

Your Y-intercept is 3/2

The x with the y as an exponent place key

(a). m = pi.   irrational;    n = 4 - pi.   irrational

m + n = 4.    rational