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It's 12 tens multiplied together, which is:

10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10

Because you can add a zero onto the end of a number when you multiply it by ten, the answer is ten with eleven zeroes behind it:

1,000,000,000,000

Spoken as one trillion!

log( a / b )  =  log(a) - log(b)

log( xy² / z³ )  =  log( xy² ) - log( z³ )  

                        =  log( x ) + log( y² ) - log( z³ )

                        =  log( x ) + 2log( y ) - 3log(z)

Drawing a triangle from the point on the ground to the base of the tree to the top of the tree and back to the point on the ground creates a right triangle.

From the point of view of the point on the ground, the side of the triangle from that point to the base of the tree (the shadow = 6m) is the adjacent side and the height of the tree (8.5m) is the opposite side.

Tangent is defined as opposite / adjacent   --->   tan(Angle)  =  8.5 / 6

                                                                                        Angle  =  tan^-1(8.5/6)

                                                                                        Angle  =  54.8°  (approximately)

If you mean:  what do you do when you are subtracting a larger number from a smaller number ---

For example:  How much is  345 - 789 ?

Reverse the problem:  789 - 345  to get  444 and attach a negative sign, because your answer is a negative number:         345 - 789  =  -444

                                  45/100 · x  =  180

Multiply both sides by 100:  45x  =  18000

Divide both sides by 45:          x  =  400

19x² + 25x²  =  (19 + 25)x²  =  45x²

Never change exponents when you are adding terms together  --  just add the coefficients and attach the variable.

Factor the denominator:

1 / [ 5m - 20 ]  =  1 / [ 5(m - 4) ]

You're done!

First, I would get rid of fractions:

---   multiply the first equation by 6:   6(x/2) + 6(y/3)  =  6(-1)   --->   3x + 2y  =  -6

---   multiply the second equation by 2:   2(x/2) + 2(2y)  =  2(4)   --->   x + 4y  =  8

Now, combine these:  3x + 2y  =  6

                                      x + 4y  =  8

If you want to eliminate the x-terms, leave the top equation alone and multiply the bottom equation by -3:

3x + 2y  =  -6   --->                                        3x + 2y  =  -6

  x + 4y  =   8   --->   multiply by -3   --->   -3x - 12y  =  -24

Add down the columns:                                      -10y  =  -30

                                                                                 y  =  3

Substitue this value back into an original equation:  x + 4y  =  8   --->   x + 4(3)  =  8   --->   x + 12  = 8

                                                                        --->   x  =  -4

                                                  2a - b  =  3

                                                  -a + b  =  4

Add down the columns:             a          =  7

--->   2a - b  =  3   --->   2(7) - b  =  3   --->   14 - b  =  3   --->   -b  =  -11   --->   b  =  11

If you walk each of them one mile and you walk them simultaneously, it will take you 3 minutes (and a long time to recover).

If you walk them individually, it will take you 3 x 67 or 201 minutes.

Other combinations will result in other answers.

thank you I was just slightly confused about using tan, sin and cos

42% of $70.00  =  0.42 x $70.00  =  $29.40.

If this is a discount, subtract $29.40 from $70.00, ending with $40.60.

You factor the numerator, then you factor the denominator. After you cancel the equal factors from the numerator and the denominator, you will have an algebraic fraction in simplest terms.

A 30° - 60° - 90° has sides that are in the ratio:  1 : √3 : 2.

The side opposite the 30° has value 1 while the hypotenuse has value 2.

Since sin = opp / hyp  the sin(30°) = 1/2 --->  sin(0.5)  =  30°.

Using a graphing calculator, the value for x was (approx) -0.2638057.

I haven't been able to find a purely algebraic way; perhaps someone else can ...

I believe that this calculator has only deg and rad modes.

This equation will change from gons to degs:  DEG  =  (9/10)·GON  or  DEG  =  0.9·GON

This equation will change from degs to gons:  GON  =  (10/9)·DEG 

$${\mathtt{2}}{\mathtt{\,\times\,}}{\mathtt{4}} = {\mathtt{8}}$$   

WHAT THE...? PRETTY SIMPLE? i mean yeah... What they said

pi is 3.14

 I NEED TO TRY THIS! I find licking it helps too.

Yes. Are you?

positive...?