The cost of the four pizzas is 4 x $10 = $<<4*10=40>>40.

The total cost, including the tip, is $40 + $5= $<<40+5=45>>45.

Therefore, Gemma gets a change of $50 - $45 = $<<50-45=5>>5.

# Answer

5
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Gemma ordered four pizzas at $10 each, and she gave a $5 tip to the delivery person. How much change did she get back if she gives one fifty-dollar bill?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
5
Gemma ordered four pizzas at $10 each, and she gave a $5 tip to the delivery person. How much change did she get back if she gives one fifty-dollar bill?
train