CPhill

There are 100 centiliters in one liter..... thus...

23 L = 23 x 100 cL  = 2300 cL

Those answers are right on, rosala....easy as falling off a log, huh ???

Let me tell you a foolproof method for dealing with unlike signs....this ALWAYS works..

Suppose we have  -3x + 5x...

First...."forget" the signs...so we have  3x and 5x

Take the "bigger" thing  and subtract the "smaller" thing...so we have

5x - 3x  = 2x

Now...what was the sign on the "bigger" thing??   a "+", right??  ..   so that's the sign we write with our  answer....  so... -3x + 5x = +2x

So, for example...what if we had -29x + 15x  ??

First....forget the signs

Take the "bigger" thing  29x  and subtract the "smaller" thing...so we have

29x - 15x   = 14x

Now....we ask ourselves the question....what was the sign on the "bigger" thing??

It was a  " -".....right??

So....that's the sign we use in our answer   =  -14x   !!!

Does that help??

Just for the heck of it...try these two and let me know what you get...remember if there is no sign, it's assumed to be  "+"

39y - 10y

- 45x  + 13x

Let the shorter leg = x    so...the longer leg = x + 2

And we have that

(1/2)(x)(x + 2) ≥ 4   multiply both sides by 2

x(x+2) ≥ 8            simplify

x^2 +2x - 8 ≥ 0      let's just use a graphical method to solve this.....here's the graph...

I'm assuming that this is  .. 

(3/4) / (7 x 3) =

(3/4) / 21=

(3/4) / (21 / 1) =   "keep"..."change"..."flip'

(3/4) x ( 1/21) =    switch denominators.....this is often a handy trick in multiplying fractions

(3/21) x (1/4) =     and 3/21  = 1/7

(1/7) x (1/4) =

1/28

Thanks.....I'm always happy to save a life.....

3x+4=0   let's subtract 4 from both sides

3x = -4    divide both sides by 3

x = -4 / 3

And that's it....

Let's be careful here, rosala.....we need to do this.....

24/25 = .96

And to covert that to a percent, just drop the decimal and add the % sign = 96%

Does that make sense??

Good answer, rosala...!!!

Well...if we're talking about rads...pi = 180 degrees

So.....pi/16 = (180/16) degrees...I'll let you calculate that one.....hint..it should be between 10 and 15 degrees...