Recent content by drooble122

c boys can mow a acres in b days. Then 1 boy (I assume this means setting c=1) can mow a acres in bc days. If you plug in c=1, then its b days. But what if I set 10 boys (c=10), then plugging it back in the number of days becomes bc=10b. This is 10 times more days than 1 boy, which makes no...

I have great difficulty understanding the solution. I'll go through it line by line: c boys can mow a acres in b days. This condition is from the problem and I understand it. 1 boy can mow a acres in bc days. Why not b/c days? After all isn't 1 boy from c/c=1? n boys, or 1 man, can mow a...

-1 -2 3 | 1 2 4 9 -31 15 | -1 -7 5 1 2 -3 7 9 -31 15 7 14 -21 -5 -10 15 5 -10 15The quotient has the coefficients -1, -7, 5. Now here is the problem. I assumed the variables would thus be...

The first image is the question and the second is the answer. My thinking is let's say North is positive, and South is negative. Fixed point O is the starting point. Then the question becomes +(2a-b)-(3a+2b). The answer should be -a-3b. I cannot fathom why the book gives the answer as a+b. Any...

Thank you very much! I understand now!

So the part in italics "an operation performed on one quantity which when performed on unity produces the other." I do not understand. Can anyone help me understand what this means? I know how to multiply fractions, but this explanation is confounding to me.