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I like the Indianapolis Colts

If you do, what is your favorite team I will rate you 5 star if you answer either question or if you answer both i would rate more if it was possible

i didn't see it posted yesterday sorry

This was posted and answered yesterday,  the answer was 8

Let n be the number  , then seven times n  is 7n   and three times n is 3n   now....the difference between them would be

7n-3n

3(7n)-(7n)

-25 But dont quote me on that

im not trying to down what you said ElectricPavlov, but I think the person was meaning if there is such thing as a -0 not if there are other things this number could mean with a negative sign in front of it

Using web2.0 calculator:

4*sin(35) = 2.294305745404

Usually when I have seen this notation used it means as a variable APPROACHES zero from the negative side.

The number e is a mathematical constant that is the base of the natural logarithm.

If e^y=x then ln(x)= y with other words the : e^(ln(x))=x is always true

It is approximately equal to 2.71828 and it is the limit of :

lim((1+1/n)^n , n=inf)=e

Simplier it is : 1 + 1/1 + 1/2 + 1/(2*3) + 1/(2*3*4) + 1/(2*3*4*5) + .. 1/(n!) while n reaches infinity .

Also if you want to know e^x is :

1 + x + (x^2)/2 + (x^3)/(2*3) + (x^4)/(2*3*4) + (x^5)/(2*3*4*5) + .. (x^n)/(n!) while n reaches infinity .

EDIT : I wanted to reply to the one who questioned but I made a mistake

Of what I know am in 9th grade there is no such thing as "-0"

...good question though

-(2^2) = -4   because you do the exponent first then negate the result

(-2)^2  = 4

2-(atan(2))*e^2 = -466.7243954853654758    using web2.0calc in degree mode

=-6.180783985639005     in radian mode

refractive index of sapphire ≈ 1.77  so sin(i)/sin(45) = 1.77,   sin(i) = 1.77*sin(45)

relative refractive index between the two materials is sin(57)/sin(45) ≈ 1.186,    sin(57) = 1.186*sin(45)

refractive index of other material is   sin(i)/sin(57)  = 1.77*sin(45)/(1.186*sin(45))  ≈ 1.5

Likely material:  Glass.

on a calculator? shift and then press sin

then you can use it how you would normally would with sin

Depends on the context.

It can mean the number 2.71828...

If it's in a computer program in the form, say, 5.2e4 it means "times ten to the power of" i.e. 5.2e4 is 5.2*10^4

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xy=20     (1)

x+y=-19     (2)    

From (2) we have y = -x -19    (3)

Use (3) in (1)

x*(-x - 19) = 20

-x^2 - 19x = 20 

rearrange

x^2 + 19x + 20 = 0

Use the quadratic equation

x = (-19 +/- sqrt(19^2 - 4*1*20))/2

to obtain:

x₊ = (sqrt(281) - 19)/2

x_- = -(sqrt(281) + 19)/2

Put these back into (3) to get the corresponding values of y.

You need to supply more information!

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Depends on the function. What one did you have in mind?

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You've missed a minus sign in the original equation Guest#1

7x - 3x - 4 = -2x + 5x - 2

4x - 4 = 3x - 2

Subtract 3x from both sides and add 4 to both sides:

x = 2

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x=30

720000

twelve