Question

write and solve an equation to show thw average number of calendars her 3rd period class sold peer week during the four week challenge?

Answer 1

If they sold 89 calendars over 4 weeks, the 'equation' would look like (x = average calendars sold over 4 weeks):
$x = \frac{89}{4}$

If you solve it, you get:
$22 \frac{1}{4}$

Which is equal to 22.25. Hope this helps!