Answer:
#1: 11 cm
#2: 16.5 in
#3: 2.5 feet
Step-by-step explanation:
#1
Solve for width by substracting 2l on both sides to isolate 2w

or

Replace.

----------------------------------------------------------------------------
#2


----------------------------------------------------------------------------
#3

Solve for l

The answer is 1 19/80 or 1.2375.
Hope this helps!
Answer:
therefore f(x)=100x-5-1 has an x-intercept
The domain of the graph is less than or equal to 0.