EXPLANATION
Let's see the facts:
The scale is---> 14 milimeters ----> 5 meters
Width = 42 milimeters
Applying the unitary method, the actual width of the pool is:

The width of the pool is 15m
I believe the answer for 17 is C. 18 I am not sure how to do. For 19, however, the answer is B. Hope I help, and sorry I can't answer 18.
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Solve the incomplete quadratic equation:

Solution set:
S = {0, 8}.
I hope this helps. =)
Answer:
Step-by-step explanation:
<h3>Given expression</h3>
<h3>Simplify the expression in steps as below</h3>
Used properties in solution process:
Answer:
80
Step-by-step explanation: