CPhill

Let N be the number....we have....

(5/7) N =  15   multiply both sides by 7/5

N = 15 (7/5)  = 21

All the time, Tetration....it must be a site flaw....I don't ever see this on any other sites that I frequent...."ghosts in the machine" ???

This says, in exponential form, that

e^1  = x .... and e^1 just equals  "e"

I think there should have been a comma between the parentheses and that "w"......

Melody, I interpret this as:

525 - 50w < 75      subtract 525 from both sides

-50w < -450          divide both sides by -50 and remember to "reverse" the inequality sign

w > 9

Thanks for that, Melody.....I never even thought of trying that in the "Calculation Box"

I'm not actually sure....but I'll tell you where it came from.....look at the top line of letters on your computer keyboard.....start with the "p"  and go back 5 letters.....what do you find???

Mmmm..let's look at this one again??

If I'm reading this correctly, we have

8^2 - [16 x [ 75/15 + √9] + 5^2] =

64 - (16 x [5 + 3] + 25 ] =

64 - [ 16 x 8 + 25 ] =

64 - 153 = -89

heureka's answer is correct...but he made a slight typo ..... 8^2 = 64 , not 84...

Sorry, heureka....but, with respect to the "fact-checking" position...YOU'RE FIRED !!!!   LOL!!!!

Maybe we should hire heureka as a "fact" checker....????

He bailed me out on one today, too....

Melody is correct, saseflower......we should check our answers....I forgot to do this today, and I gave a wrong answer....shame on me...!!!