Answer: -9z + 15/x^2
The correct answer is -9z + 15/x^2 when simplified
<em>Hope this helps =)</em>
I think I only know the second part.
3c=55t+5f
3c=60f
c=20f
The missing number is 20
<h3>How to determine the number</h3>
We can see that the values at the top must be made equal to that at the bottom
For the top, we have
30 + 11 = 41
For the bottom, we should have:
21 + x = 41
Now, let's solve for 'x' to determine the missing figure;
21 + x = 41
collect like terms
x = 41 - 21
x = 20
Thus, the missing number is 20
Learn more parallel lines here:
brainly.com/question/13999767
#SPJ1