I only made one ,
there I leave you an image with the whole procedure
Answer:
= 
Step-by-step explanation:
Differentiate xy using the product rule, then
Given
x - y = xy
1 -
= x.
+ y. 1 = x
+ y ( subtract 1 from both sides )
-
= x
+ y - 1 ( subtract x
from both sides )
-
- x
= y - 1 ( multiply through by - 1 )
+ x
= 1 - y
(1 + x) = 1 - y ← divide both sides by (1 + x)
= 
Answer:
27
Step-by-step explanation:
4a + 5b
12 + 15
=27
<span>the skyscraper is 1421in or about 118ft 11ish stories.</span>