Answer: C. Independent equations.
Hope tis helps you out.
If Sofia and Juana worked together I would take them 1 hour
<span>(13 + 5) + 5 = 23
</span>
associative property of addition
<span>13 + (5 + 5) = 23</span>
B - line graph. A line graph should be added because he wants to know how many of available apartments there were during the time of the year and line graphs are usually up and down on the info.