Which image a'b'c'd' of abcd cannot be produced using only reflections

The classrooms are trying to raise $1,200.00 for charity. mrs. leblanc's class has raised 50%. mr. patel's class has raised $235.14 ms. warner's class has raised 1/3 as much as mrs. leblanc's class. how much more money is needed to reach the goal of $1,200.00?

Find the area of the regular hexagon if a side is 20 cm.

Combine like terms to make a simpler expression 3z+z