Answer:
<u>The</u><u> </u><u>solution</u><u> </u><u>is</u><u> </u><u>B</u>
Step-by-step explanation:

then:

therefore, interval [limits] of x:

Answer:
A. and C.
Step-by-step explanation:
We don't know the area of the roof or the number of people in the group so they would both be represented by variables in an equation.