Answer:
There are 9 lemon bars left from the batch.
Step-by-step explanation:
One batch = 15 lemon bars
Josh: ate 2 lemon bars
[tex]15 - 2 = 13[/tex]
13 lemon bars remaining.
Claire: ate twice as many as Josh
Meaning: 2 × 2 = 4
[tex]13 - 4 = 9[/tex]
9 lemon bars remaining.
There are 9 lemon bars left from the batch.