CPhill

The markup is just   $9450 x .30 =  $2835

LOL, Jillybean....!!!

"Markup" is the difference between the cost of a good to a retailer and what he/she sells it for. Generally, it's stated as a percentage in one or two ways: 1) on the cost ... or 2) on the sales price.

This is called an "indeterminate" form...to see why....note that...

6 / 3 = 2   because 2 x 3 = 6

but

0 / 0 = 11   because 11 x 0 = 0

however

0 / 0  = pi    because pi x 0  = 0

Thus, 0 / 0 can be most anything we'd like it to be......(in short, we can't determine what it is.....)

2−15(−x+1)=3+2(5−x)   simplifying on both sides, we have

2 + 15x - 15 = 3 + 10 - 2x

-13 + 15x = 13 - 2x      add 2x to both sides, add 13 to both sides

17x = 26      divide both sides by 17

x = 26 / 17

(7x - 4)(3x + 9)    ....using "FOIL." we have

21x^2 - 12x + 63x - 36  =

21x^2 + 51x -36

Well...not to disappoint you, but there are an infinite number of them....the first one, though, is just 18 x 19  =  342  ...!!!

Bueno ... no decepcionar a usted, pero hay un número infinito de ellos .... la primera, sin embargo, es sólo 18 x 19 = 342 ... !!!

That's an age-old debate......was it "invented," or.....was it always out there in the "ether" waitng to be discovered???

Since I always like a bit of the "fantastic" and the influence of the "Muses," I tend go with the second school of thought.....

Of course, who knows???....I could be wrong......LOL.....!!!

I don't think that that answer is correct, Anonymous....if one number increased by 10, we couldn't have a mean that was less than before...!!

The correct answer is that the mean would increase by 2......(130 + 10) / 5 = 140 / 5   = 28  ....!!!

We can find this by taking  the log of this number

log ( 14582000 ) = 7.1638170938993255

So this says that

10^ 7.1638170938993255 = 14582000

I believe that you're trying to find the distance between (-2, 0) and (3, 2).....so we have....

√ [(-2-3)^2+(0-2)^2 ] =

√[(-5)^2 + (-2)^2 ] =

√(25 + 4)  =

√29 = about 5.39