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You can just add them together with this site: 129211732691

x + 1800 - 2700 = 800

Solve for x: First combine the 2 numbers on the left

x - 900 = 800

Now add 900 to the right to get x

x = 800 + 900

x = 1700

Could you give more information on the problem you're doing this with?

But the easiest way: If you have the exact answer, and the estimate is lower than that answer, it's an underestimate. If it's higher, then it's an overestimate.

A negative is just a minus sign. So if you want negative 12, do -12. :) That's all there is to it!

Just add the two numbers: 9 + 10 = 19

No prob :)

On web2.0calc, just use a slash, / to make fractions. Just make sure the numerator and denominator are in parentheses.

Here's an example: (2x-4)/(x^2 - 3)

thanks buddy

That's exactly how to do it - Area of a rectangle is width times height, so do 2.12 * .79.

2.12 * .79 = 1.6748 m^2

(Don't for get to include units meters squared)

To do sin-1 on web2.0calc, it is not sin-1: It is asin()

So do asin(value) to get what you want :)

2(2p + 3) + 4(p - 4)

You have to use the distributive property to simplify this expression. Multiply the outside number by both of the numbers in the parentheses, and then add the results together.

For 2(2p + 3), do 2 * 2p + 2 * 3

For 4(p - 4), do 4 * p + 4 * -4

So in all:

2 * 2p + 2 * 3 + 4 * p + 4 * -4

4p + 6 + 4p - 16

8p - 10

7 and 7/8 as a decimal: You can do one of two things: Convert the fraction to improper and solve, or just solve as it is.

The improper fraction is 63/8. Now do 63 divided by 8, which gives you 7.875 as the decimal.

The second way is to do 7 + 7 divided by 8. 7 + .875 = 7.875

3(x - 2)

When a number is by the parentheses, it is another way of saying multiply. So you can look at it like this:

3 * (x - 2)

Now use the distributive property to simplify this expression

3x - 6

Solving systems of equations requires you to solve one equation for a variable. Then plug that equation into the second equation, and solve. Here's an example:

Equation 1: y = 2x + 5
Equation 2: -5x = y + 2

Since you already know from the first equation that y = 2x + 5, put 2x + 5 into the second equation, and solve.

-5x = (2x + 5) + 2
-5x = 2x + 7
-7x = 7
x = -1

Now plug in x to one equation to solve for y:

y = 2(-1) + 5
y = 3

All you have to do is calculate 32% of 371,000 kilometers. So convert 32% to decimal, and then multiply by 371,000. 

371,000*.32 = 118,720 kilometers. :)

yea i love this website and im talking to myself thats not right

no clue man 

sin-1 is the inverse of sin. When you have sin(x) and you want to get x on its own on one side, you bracket the other side with sin-1.

Example:

sin(x)=3/5

x=sin-1(3/5)

If you are just looking for the slope, or gradient of the line and you have a perpendicular line slope/gradient, all you need to do is multiply by -1 and flip the fraction/get the reciprocal of the gradient of the perpendicular line.

-3/2 x -1=3/2

Flip the fraction to get 2/3

That is the gradient of the line.

For the equation of the line, you can draw it or visulise a graph because you don't have a second co-ordinate.

So for every 3, it goes 2 up.

The equation for a line that has gradient 2/3 and passes through point (6,3) would be

y=2/3x-1

The percent the player hits in the first season is $${\frac{{\mathtt{153}}}{{\mathtt{572}}}} = {\mathtt{0.267\: \!482\: \!517\: \!482\: \!517\: \!5}}$$

The second season is $${\frac{{\mathtt{172}}}{{\mathtt{576}}}} = {\frac{{\mathtt{43}}}{{\mathtt{144}}}} = {\mathtt{0.298\: \!611\: \!111\: \!111\: \!111\: \!1}}$$

Combined, the percentage hit would be $${\frac{{\mathtt{1}}}{{\mathtt{2}}}}{\mathtt{\,\times\,}}\left({\frac{{\mathtt{153}}}{{\mathtt{572}}}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{172}}}{{\mathtt{576}}}}\right) = {\mathtt{0.283\: \!046\: \!814\: \!296\: \!814\: \!3}}$$ or 28.3%

The first time would be a 5/14 chance. Depending on which ball you first picked will determine the chance of picking a blue ball. If a yellow ball was picked, then the chance of picking a blue ball would be 5/13. If the first time a red ball was picked, the chance would also be 5/13. If the first ball was a blue ball, then the change of picking another blue ball would be 4/13, and so on.

$${\frac{{\mathtt{21}}}{{\mathtt{360}}}}{\mathtt{\,\times\,}}{\mathtt{36}}$$

We can cancel the 360 and 36 so we get

$${\frac{{\mathtt{21}}}{{\mathtt{10}}}}{\mathtt{\,\times\,}}{\mathtt{1}}$$

So now we can make it a mixed number fraction which is $${\mathtt{2}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{1}}}{{\mathtt{10}}}}$$ which is 2.1.

$${\frac{{\mathtt{1}}}{{\mathtt{3}}}}{\mathtt{\,\times\,}}{\mathtt{6}}$$

We can simplify this by canceling the 3 and 6 to get 1 and 2. So

$${\frac{{\mathtt{1}}}{{\mathtt{1}}}}{\mathtt{\,\times\,}}{\mathtt{2}}$$

This way we can see that the answer is 2

Unless "a" has been given a value, the answer to this is still 12a+42. If a has a value, we times 12 by the value of "a" and then add 42.