NinjaDevo

"what number" can be expressed as x, because we don't know what it is.

5.4(3k-12)+3.2(2k-6)=-136

(5.4 x 3k) + (5.4 x -12) + (3.2 x 2k) + (3.2 x -6) = -136

16.2k + (-64.8) + 6.4k + (-19.2) = -136

16.2k + (-64.8) + 6.4k + (-19.2) = -136

22.6k + (-64.8) + (-19.2) 

22.6k + -84 = -136

            +84    +84

----------------------------

22.6k = -52

k ≈ 2.3

6x+3=4x+11                      ---Subtract 4x from both sides to "clear" 4x from the right side

-4x     -4x

--------------------

2x + 3 = 0 + 11

2x + 3 = 11                           ---Subtract 3 from both sides to "clear" 3 from the left side

     - 3      -3

---------------------

2x = 8                               ---Finally, divide both sides by 2

2 ÷ 2x = 8 ÷ 2

2 ÷ 2x = 4

x = 4

4 goes into -12 and 4.

Also, 2 goes into -12 and 4

In scientific notation, we want one number before the decimal, and we can have as many as we want after the decimal. This number will then be multiplied by 10 raised to an exponet. So, we can move the deicmal over one place to the right, but then we need to multiply that by 10^-1.

So your answer would be 2.56 x 10^-1.

Sorry. I'm not really sure how to explain this any better. 

Distribute out the -2 like so:

We don't know what k is, so -6k + 14 is our final answer.

This would be a good one to do on a calculator. Here's what the website's calculator says:

$${{\mathtt{1.020\: \!4}}}^{\left({\mathtt{12.166\: \!6}}\right)} = {\mathtt{1.278\: \!517\: \!144\: \!686\: \!032\: \!8}}$$

There's not a question here. Please spesify your question and we'd be happy to help you out. :)

4 + 9 = 13

First, we have to start by adding 17 to both sides so we can "clear" the -17 from the left side. We can always to this as long as we do it to both sides.