Hi good people!,
please help me with this problem:
If:
xy=23andyz=75
determine the value of zx
Hi Alan,
thanx for the response, but I do not understand..
Why is the result of step 1, equal to xz ?
I fail to see how the result connects to "x" and "z"...please explain if that's okay?
thank you kindly..
There is a common factor of y in the numerator and denominator of xy∗yz. Thus, it can be canceled out.like Alan showed. xy∗yz=xz.
We know from the given information that xy=23 and yz=75. Substitute these values in for xy and yz. I guess I will rewrite Alan's work:
xy∗yz=xz23∗75=1415
At this point, Alan just took the reciprocal of both sides to get the equation in terms of zx:
xz=1415zx=1514
"I fail to see how the result connects to "x" and "z"...please explain if that's okay?"
The original question asked for the ratio of z to x, and we have found that answer to be 15 to 14. Does that clear it up for you?
Hello guest and Alan,
sorry for coming back only now...I guess this is one of those sums that I just never will grasp, simply because:
guest stated (and Alan), I suppose, that the "y" can be canceled, because it is a common factor...okay, we can do that when we have only the variables, but when they are assigned values, it's a diferent story, because I cannot just cancel the "Y" values..so, I cannot just cancel the "7" and the "3". So we multiply with them. This gives me the result of 1514, but this answer includes "y"..so the answer is not purely "x" and "z" only..maybe I'm over-complicating things here, but I just cannot see it.
It;s to say this: x * y = x, and y * z = z...which is not true
anycase, you guys had been helpful, I do appreciate...