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THAT is an EXPRESSION....not anything I can do with that.

When you add an EQUAL sign it becomes an EQUAtion   (get it?)

3x+9 + y  =  7    is an EQUAtion WITH two variables  x and y.

to solve equations , you have to have an equation for each VARIABLE.....two equations, two variables......or you can SOLVE for ONE of the variables...but you cannot get a numerical value for the variable

example

solve 3x+9 + y =7      for 'y'    that means : Manipulate the given equation until you have y= on one side

3x+9+y=7    Subtract 3x from both sides of the equation (this still makes it EQUAL)

3x-3x +9 + y = 7-3x

9+y = 7 - 3x      (because...well 3x-3x is zero)

Now subtract  '9' from both sides

9 - 9 + y = 7-3x - 9

y=7-3x-9

y=-2-3x    and you have solved the equation  FOR 'y' in TERMS of 'x''.....

Can't  do much with what you have given us......got more info?

You might need 1 million apples, but no matter how much you want, you still only have one.

1. The speed of light is 299 792 458 m/s (meters per second)

2. Please use a calculator. Also, I highly doubt that is something you need to find out. I saved you the time, however:  answer = 11111111111088889099999999999999787777987896545245114527563325313467

3. Pi is approximately 3.1415926535897932384626433832795028841971693993751058209749

Google it. The first hit tells you.

7x = +- 28

x = 4 or -4

......Ahhhh    the simplified radical form .     Just couldn't understand what was being asked!

There are two significant figures since there are two digits before the multiply symbol.

-30/4 (or -7.5)

-30/4

If you understand temperature then this should help.

On hot days the temprature is positive.

In the freezer, the tamperature is negaive.

So positive numbers are  'hot' numbers and negative numbers are 'cold' numbers.

You are in the freezer, so the temperature is neagative.

You introduce even more very cold air.  so you have     -temp + -temp = even colder temp that is a bigger negative number than what you had to start with.

-10+-8= -18

-10+-1 = -11

    What is the molar mass of PbO_2 =239.2 g/mol

really lol

Since you know both the slope and a point, use the point-slope form:  y - y₁  =  m(x - x₁)

   m = -5/9     x₁ = -1     y₁ = 6                                                                 y - 6  =  (-5/9)(x - -1)

                                                                                                               y - 6  =  (-5/9)(x + 1)

Multiply both sides by 9:                                                                      9(y - 6)  =  -5(x + 1)

Use the distributive property:                                                                9y - 54  =  -5x - 5

Simplify:                                                                                                 5x + 9y  =  49

Pi is 3.14159265359 

sqrt( 1096 )  =  sqrt( 4 · 2 · 137 )  =  sqrt(4) · sqrt(2·137)  =  2 sqrt(274)

Since 2 and 137 are prime numbers, 2·137  =  274  can't be removed from the square root.

Yes you are right! haha but I have the answer to it sorry about that!

Exactly what you said you need: 1 apple

Not sure what exactly you are asking....

the sqrt(1096) =33.10589    the  sqrt of that is 5.753772

Since BD bisects angle(ABC), angle(ABD)  =  angle(DBC).

                                                     ½y + 10  =  y + 4

Subtract ½y from both sides:                 10  =  ½y + 4

Subtract 4 from both sides:                      6  =  ½y

Multiply both sides by ½:                         12  =  y

So:  angle(ABD)  =  ½y + 10  =  ½(12) + 10  =  6 + 10  =  16

       angle(DBC)  =  y + 4  =  12 + 4  =  16

Angle(ABC)  =  angle(ABD)  +  angle(DBC)  =  16 + 16  =  32.

When adding a negative number to another negative number, your answer will be negative.

Examples:     - 6 + -4  =  -(6 + 4)  =  -10

                      -7 + -2  =  -(7 + 2)  =  -9

First:  find slope:  m  =  ( y₂ - y₁ ) / ( x₂ - x₁ )           x₁ = -4     y₁ = 5     x₂ = 1     y₂ = 0

                            m  =  ( 0 - 5 ) / ( 1 - -4 )

                            m  =  -5 / 5

                            m  =  -1

Use point-slope form:     y - y₁  =  m( x - x₁ )

                                       y - 5  =  -1( x - -4 )

                                       y - 5  =  -1( x + 4 )

                                       y - 5  =  -x - 4

                                            y  =  -x + 1

[Your English is fine!]

I take that back.....it does repeat after 16 digits ....you are correct!

210000000000000000 in standard form

It is ALREADY in standard form!!

210,000,000,000,000,000 =2.1 x 10^17 in scientific notation.

Here is the answer I got on an online  'really big number calculator'  :   (as you can see it repeats itself after 16 sets of 3 digits)

0.647 058 823 529 411 764 705 882 352 941 176 470 588 235 294 117 647 058 823 529 411 764 705 882 352 941 176 470 588 235 294 117 647 058 823 529 411 764 705 882 352 941 176 470 588 235 294 117 647 058 823 529 411 764 705 882 352 941 176 470 588 235 294 117 647 058 823 529 411 764 705 882 352 941 176 470 588 235 294 117 647 058 823 529 411 764 705 882 352 941 176 470 588 235 294 117 647 058 823 529 411 764 705 882 352 941 176 470 588 235 294 117 647 058 823 529 411 764 705 882 352 941 176 470 588 235 294 117 647 058 823 529 411 764 705 882 352 941 176 470 588 235 294 117 647 058 823 529 411 764 705 882 352 941 176 470 588 235 294 117 647 058 823 529 411 764 71