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((-1*0.056)-√(0.056²-(4*1*0.056)))/2)

((-0.056)-√(0.003136-0.224))/2)

(0.003136-0.224) is less than 1 and there are no real solutions to the square root of a negative number.

so

This has no real solutions

It has complex solutions but they are imaginary numbers so you don't need to worry about those. :)

Actually both are incorrect. To get nanoliters to decoliters, you use the equation 1x10^(-10).In this case, the amount of nanoliters is 350 billion. So, you replace 1 with 350 billion. Your equation should then be 350,000,000 x 10 ^(-10)= 0.035 The amount of decoliters is 0.035.

How do I center a small circle into a bigger one perfectly...

The equation of a circle is

\(\boxed{(x-h)^2+(y-k)^2=r^2}\)where (h,k) is the centre and r is the radius.

so if  you have 2 circle equations with the same centre but with different radii, they will be concentric circles.

eg

\((x+1)^2+(y-3)^2=16\qquad and\\ (x+1)^2+(y-3)^2=9\)

Not sure if I am naswering the question, but 

(1/6)^x  -7 = 29     add seven to both sides of the equation

(1/6)^x = 36        Now take the LOG of both sides

x LOG(1/6) = log(36)

x= LOG(36)/log(1/6) =

x=  -2.

Guest 1 is correct   56/100 =  28/50 = 14/25      Sorry for the error in my first answer

Watts = Volts x Amps = 10^4 x 500 =5,000,000 = 5.0 x 10^6 Watts!!!!!!.

P.S. An "electric furnace" shouldn't use that much energy!! There appears to be something wrong with your voltage. It should be in the range of 120 to 240 volts. Check your numbers carefully.

sqrt(1225)   =

sqrt ( 5 * 245) =

sqrt ( 5 * 5 * 49)  =

sqrt ( 25 * 49)  =

sqrt 25 * sqrt 49  = 

5 * 7   =

35

(3x+10)° and (2x+20)°.

Since the opposte angles of a cyclic quadrilateral sum to 180°, we have that

(3x + 10) + (2x + 20)  = 180   simplify the left side

5x + 30   = 180       subtract 30 from each side

5x  = 150     divide both sides by 5

x =  30

So.....the first angle = [ 3(30) + 10 ] = [ 90 + 10 ] = 100°

And the second angle = 180 - 100 = 80°

-5, 12......and r will =   sqrt [ (-5)^2 + 12^2 ] = sqrt[169] = 13

I'm assuming that x = -5 and y = 12

So...

sin =  y/r =  12/13

csc = r/y = 13/12

cos = x/r = -5/13

sec = r/x = -13/5

tan =  y/x =-12/5

cotangent = x/y = -5/12

3600sec=1h
20sec=x?

x = 20/3600

x = 1/180 of an hour.

x / (x + 2) = 1/3   cross multiply

3x = x + 2            re-arrange

3x - x = 2

2x = 2

x =2/2

x = 1

what is 2 5/8 -1 1/3

If the expression a^4 - 4a^2 - b is a perfect sqaure, the value of b is?

23 and 3/4 divided by 1 and 3/5

   3/4sqrt(3)(4.2)^2 = 22.9150...

Because "a +bi" is a Complex mode. And you will get "weird" answers. If you haven't taken "complex Math", then you wouldn't understand it. If that is the case, ignore your friend's suggestion and use your calculator in "normal" mode.

Simplify the following:
(23 + 3/4)/(1 + 3/5)

Put 1 + 3/5 over the common denominator 5. 1 + 3/5 = 5/5 + 3/5:
(23 + 3/4)/(5/5 + 3/5)

5/5 + 3/5 = (5 + 3)/5:
(23 + 3/4)/((5 + 3)/5)

5 + 3 = 8:
(23 + 3/4)/(8/5)

Put 23 + 3/4 over the common denominator 4. 23 + 3/4 = (4×23)/4 + 3/4:
((4×23)/4 + 3/4)/(8/5)

4×23 = 92:
(92/4 + 3/4)/(8/5)

92/4 + 3/4 = (92 + 3)/4:
((92 + 3)/4)/(8/5)

92 + 3 = 95:
(95/4)/(8/5)

Multiply the numerator by the reciprocal of the denominator, (95/4)/(8/5) = 95/4×5/8:
(95×5)/(4×8)

4×8 = 32:
(95×5)/32

95×5 = 475:
Answer: |475/32 = 14 27/32

Add up all the items on sale for that day:

20+160+640+40+5+1,280+320+80+10 = $2,555

Commission on $2,555 @ 20% =$511 for both men. But, since John got $1 more, that means:

511 -1 = $510 is to be divided evenly between the two men, or:

$510/2 = $255 each.

Since John got $1 more, or $255 + $1 = $256, it therefore follows that John sold:

$256/20% =$1,280, which turns out to be the most expensive item on the list.

Therefore, ALL the other items were sold by Paul including the $160 item, because:

$2,555 - $1,280 = $1,275 x 20% = $255, which is Paul's commission as stated above.

Use the key labled "x^y". Example: 3^4. You enter 3 first, then x^y key, then 4 and = sign to get the answer.

25 x 5 = 125

A= 2, B=5, C=1

ı don't know if you learn it somewehere please teach me 

Correct!  I've removed my incorrect comment.

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Hi Max

I'm with GingerAle, the expression after the Big Pi is equal to a+b when c = 0, it's equal to a+b when c = 1, it's equal to a+b when c = 2, and so on all the way upto c = n. The product of all of those will be (a + b)^(n+1).

There has to be something wrong though since the largest power of a on the lhs is 2n, while on the rhs it's n+2.